| 29 June 10 | To reflect buyback of 25,000 shares |
| 3 June 10 | To reflect buyback of 21,000 shares |
| 19 May 10 | To reflect buyback of 38,000 shares |
| 18 May 10 | To reflect buyback of 43,000 shares |
| 17 May 10 | To reflect buyback of 70,000 shares |
| 14 May 10 | To reflect buyback of 25,000 shares |
| 10 May 10 | To reflect buyback of 20,000 shares |
| 5 May 10 | To reflect buyback of 25,000 shares |
| 26 Mar 10 | To reflect buyback of 20,000 shares |
| 25 Mar 10 | To reflect buyback of 43,500 shares |
| 23 Mar 10 | To reflect buyback of 32,500 shares |
| 22 Mar 10 | To reflect buyback of 32,000 shares |
| 19 Mar 10 | To reflect buyback of 25,000 shares |
| 18 Mar 10 | To reflect buyback of 11,000 shares |
| 17 Mar 10 | To reflect buyback of 21,500 shares |
| 12 Mar 10 | To reflect buyback of 75,000 shares |
| 9 Mar 10 | To reflect buyback of 25,000 shares |
| 1 Mar 10 | To reflect buyback of 24,000 shares |
| 23 Feb 10 | To reflect buyback of 133,000 shares |
| 22 Feb 10 | To reflect buyback of 34,000 shares |
| 19 Feb 10 | To reflect buyback of 175,000 shares |
| 18 Feb 10 | To reflect buyback of 10,000 shares |
| 17 Feb 10 | To reflect buyback of 30,000 shares |
| 16 Feb 10 | To reflect buyback of 255,000 shares |
| 11 Feb 10 | To reflect buyback of 45,000 shares |
| 8 Feb 10 | To reflect buyback of 10,000 shares |
| 4 Feb 10 | To reflect buyback of 25,000 shares |
| 3 Feb 10 | To reflect buyback of 47,000 shares |
| 2 Feb 10 | To reflect buyback of 12,000 shares |
| 29 Jan 10 | To reflect buyback of 25,000 shares |
| 5 Jan 10 | To reflect buyback of 27,500 shares |
| 24 Dec 09 | To reflect buyback of 50,000 shares |
| 23 Dec 09 | To reflect buyback of 10,000 shares |
| 21 Dec 09 | To reflect buyback of 25,000 shares |
| 16 Dec 09 | To reflect buyback of 25,000 shares |
| 11 Dec 09 | To reflect buyback of 29,000 shares |
| 9 Dec 09 | To reflect buyback of 20,121 shares |
| 4 Dec 09 | To reflect buyback of 29,000 shares |
| 3 Dec 09 | To reflect buyback of 25,000 shares |
| 2 Dec 09 | To reflect buyback of 21,000 shares |
| 24 Nov 09 | To reflect buyback of 10,000 shares |
| 23 Nov 09 | To reflect buyback of 52,900 shares |
| 20 Nov 09 | To reflect buyback of 20,000 shares |
| 19 Nov 09 | To reflect buyback of 25,000 shares |
| 18 Nov 09 | To reflect buyback of 27,000 shares |
| 17 Nov 09 | To reflect buyback of 14,000 shares |
| 13 Nov 09 | To reflect buyback of 24,000 shares |
| 12 Nov 09 | To reflect buyback of 31,550 shares |
| 10 Nov 09 | To reflect buyback of 45,000 shares |
| 06 Nov 09 | To reflect buyback of 29,400 shares |
| 30 Oct 09 | To reflect buyback of 25,000 shares |
| 23 Oct 09 | To reflect buyback of 50,000 shares |
| 7 Oct 09 | To reflect buyback of 20,000 shares |
| 6 Oct 09 | To reflect buyback of 11,500 shares |
| 1 Oct 09 | To reflect buyback of 24,000 shares |
| 24 Sep 09 | To reflect buyback of 28,500 shares |
| 18 Sep 09 | To reflect buyback of 17,500 shares |
| 17 Sep 09 | To reflect buyback of 15,000 shares |
| 16 Sep 09 | To reflect buyback of 20,000 shares |
| 4 Sep 09 | To reflect buyback of 20,000 shares |
| 2 Sep 09 | To reflect buyback of 20,000 shares |
| 27 Aug 09 | To reflect buyback of 100,000 shares |
| 26 Aug 09 | To reflect buyback of 40,000 shares |
| 20 Aug 09 | To reflect buyback of 49,500 shares |
| 14 Aug 09 | To reflect buyback of 30,000 shares |
| 7 Aug 09 | To reflect buyback of 14,000 shares |
| 30 Jul 09 | To reflect buyback of 20,000 shares |
| 30 Apr 09 | To reflect buyback of 16,000 shares |
| 27 Mar 09 | To reflect buyback of 16,400 shares |
| 15 Aug 08 | To reflect buyback of 10,000 shares |
| 1 May 08 | To reflect buyback of 140,000 shares |
| 1 May 08 | To reflect buyback of 150,000 shares |
| 25 Apr 08 | To reflect buyback of 32,000 shares |
| 11 Mar 08 | To reflect buyback of 25,000 shares |
| 31 Oct 07 | To reflect buyback of 50,000 shares |
| 29 Oct 07 | To reflect buyback of 16,500 shares |
| 26 Oct 07 | To reflect buyback of 23,000 shares |
| 25 Oct 07 | To reflect buyback of 56,000 shares |
| 16 Oct 07 | To reflect buyback of 39,000 shares |
| 1 Oct 07 | To reflect buyback of 19,000 shares |
| 20 Sep 07 | To reflect buyback of 25,001 shares |
| 17 Sep 07 | To reflect buyback of 25,000 shares |
| 12 Sep 07 | To reflect buyback of 30,000 shares |
| 11 Sep 07 | To reflect buyback of 70,000 shares |
| 10 Sep 07 | To reflect buyback of 52,000 shares |
| 7 Sep 07 | To reflect buyback of 19,000 shares |
| 6 Sep 07 | To reflect buyback of 10,000 shares |
| 30 Aug 07 | To reflect buyback of 23,000 shares |
| 29 Aug 07 | To reflect buyback of 12,000 shares |
| 28 Aug 07 | To reflect buyback of 8,000 shares |
| 9 Aug 07 | To reflect buyback of 260,000 shares |
| 31 Jul 07 | To reflect buyback of 18,000 shares |
| 25 Jul 07 | To reflect buyback of 15,000 shares |
| 24 Jul 07 | To reflect buyback of 40,000 shares |
| 23 Jul 07 | To reflect buyback of 27,000 shares |
| 20 Jul 07 | To reflect buyback of 125,000 shares |
| 19 Jul 07 | To reflect buyback of 40,000 shares |
| 17 Jul 07 | To reflect buyback of 143,000 shares |
| 13 Jul 07 | To reflect buyback of 161,000 shares |
| 13 Jul 07 | To reflect buyback of 68,000 shares |
| 11 Jul 07 | To reflect buyback of 40,000 shares |
| 10 Jul 07 | To reflect buyback of 53,000 shares |
| 9 Jul 07 | To reflect buyback of 320,000 shares |
| 6 Jul 07 | To reflect buyback of 136,000 shares |
| 2 Jul 07 | To reflect buyback of 11,000 shares |
| 28 Jun 07 | To reflect buyback of 30,000 shares |
| 26 Jun 07 | To reflect buyback of 40,000 shares |
| 25 Jun 07 | To reflect buyback of 30,000 shares |
| 22 Jun 07 | To reflect buyback of 26,000 shares |
| 21 Jun 07 | To reflect buyback of 20,000 shares |
| 19 Jun 07 | To reflect buyback of 17,000 shares |
| 18 Jun 07 | To reflect buyback of 36,000 shares |
| 15 Jun 07 | To reflect buyback of 77,500 shares |
| 14 Jun 07 | To reflect buyback of 75,000 shares |
| 13 Jun 07 | To reflect buyback of 93,000 shares |
| 12 Jun 07 | To reflect buyback of 1,195,000 shares |
| 11 Jun 07 | To reflect buyback of 18,000 shares |
| 8 Jun 07 | To reflect buyback of 55,000 shares |
| 1 Jun 07 | To reflect buyback of 21,000 shares |
| 30 May 07 | To reflect buyback of 20,000 shares |
| 24 May 07 | To reflect buyback of 45,000 shares |
| 1 May 07 | To reflect buyback of 36,000 shares |
| 27 Apr 07 | To reflect buyback of 61,000 shares |
| 26 Apr 07 | To reflect buyback of 41,000 shares |
| 25 Apr 07 | To reflect buyback of 51,000 shares |
| 24 Apr 07 | To reflect buyback of 65,000 shares |
| 23 Apr 07 | To reflect buyback of 75,000 shares |
| 20 Apr 07 | To reflect buyback of 31,000 shares |
| 19 Apr 07 | To reflect buyback of 25,000 shares |
| 18 Apr 07 | To reflect buyback of 45,000 shares |
| 17 Apr 07 | To reflect buyback of 25,000 shares |
| 13 Apr 07 | To reflect buyback of 50,000 shares |
| 12 Apr 07 | To reflect buyback of 227,000 shares |
| 10 Apr 07 | To reflect buyback of 27,000 shares |
| 5 Apr 07 | To reflect buyback of 18,000 shares |
| 4 Apr 07 | To reflect buyback of 25,000 shares |
| 3 Apr 07 | To reflect buyback of 10,000 shares |
| 29 Mar 07 | To reflect buyback of 28,500 shares |
| 28 Mar 07 | To reflect buyback of 150,000 shares |
| 27 Mar 07 | To reflect buyback of 55,000 shares |
| 26 Mar 07 | To reflect buyback of 25,000 shares |
| 23 Mar 07 | To reflect buyback of 25,000 shares |
| 19 Mar 07 | To reflect buyback of 22,000 shares |
| 12 Mar 07 | To reflect buyback of 20,000 shares |
| 8 Mar 07 | To reflect buyback of 30,000 shares |
| 7 Mar 07 | To reflect buyback of 35,000 shares |
| 5 Mar 07 | To reflect buyback of 25,000 shares |
| 16 Feb 07 | To reflect buyback of 15,000 shares |
| 15 Feb 07 | To reflect buyback of 33,000 shares |
| 13 Feb 07 | To reflect buyback of 25,000 shares |
| 6 Feb 07 | To reflect buyback of 200,000 shares |
| 31 Jan 07 | To reflect buyback of 22,000 shares |
| 29 Jan 07 | To reflect buyback of 35,000 shares |
| 17 Jan 07 | To reflect buyback of 29,000 shares |
| 10 Jan 07 | To reflect buyback of 25,000 shares |
| 5 Jan 07 | To reflect buyback of 35,000 shares |
| 15 Dec 06 | To reflect buyback of 29,000 shares |
| 14 Dec 06 | To reflect buyback of 41,000 shares |
| 11 Dec 06 | To reflect buyback of 60,000 shares |
| 4 Dec 06 | To reflect buyback of 200,000 shares |
| 28 Nov 06 | To reflect buyback of 23,000 shares |
| 31 Oct 06 | To reflect buyback of 57,000 shares |
| 24 Oct 06 | To reflect buyback of 44,000 shares |
| 17 Oct 06 | To reflect buyback of 60,000 shares |
| 29 Sep 06 | To reflect buyback of 33,000 shares |
| 27 Sep 06 | To reflect buyback of 75,000 shares |
| 26 Sep 06 | To reflect buyback of 70,000 shares |
| 25 Sep 06 | To reflect buyback of 25,000 shares |
| 21 Sep 06 | To reflect buyback of 20,000 shares |
| 20 Sep 06 | To reflect buyback of 25,000 shares |
| 15 Sep 06 | To reflect buyback of 26,000 shares |
| 7 Sep 06 | To reflect buyback of 268,281 shares |
| 6 Sep 06 | To reflect buyback of 30,000 shares |
| 5 Sep 06 | To reflect buyback of 1,500,000 shares |
| 31 Aug 06 | To reflect buyback of 20,000 shares |
| 30 Aug 06 | To reflect buyback of 15,000 shares |
| 29 Aug 06 | To reflect buyback of 20,000 shares |
| 25 Aug 06 | To reflect buyback of 20,000 shares |
| 24 Aug 06 | To reflect buyback of 30,000 shares |
| 22 Aug 06 | To reflect buyback of 24,000 shares |
| 21 Aug 06 | To reflect buyback of 58,000 shares |
| 18 Aug 06 | To reflect buyback of 60,500 shares |
| 17 Aug 06 | To reflect buyback of 30,000 shares |
| 15 Aug 06 | To reflect buyback of 25,000 shares |
| 14 Aug 06 | To reflect buyback of 27,500 shares |
| 11 Aug 06 | To reflect buyback of 25,000 shares |
| 10 Aug 06 | To reflect buyback of 65,000 shares |
| 8 Aug 06 | To reflect buyback of 17,000 shares |
| 7 Aug 06 | To reflect buyback of 33,000 shares |
| 4 Aug 06 | To reflect buyback of 95,000 shares |
| 3 Aug 06 | To reflect buyback of 70,000 shares |
| 2 Aug 06 | To reflect buyback of 209,141 shares |
| 31 Jul 06 | To reflect buyback of 80,000 shares |
| 20 Jul 06 | To reflect buyback of 23,000 shares |
| 18 Jul 06 | To reflect buyback of 54,000 shares |
| 12 Jul 06 | To reflect buyback of 33,000 shares |
| 11 Jul 06 | To reflect buyback of 50,000 shares |
| 10 Jul 06 | To reflect buyback of 40,000 shares |
| 7 Jul 06 | To reflect buyback of 10,000 shares |
| 5 Jul 06 | To reflect buyback of 47,000 shares |
| 28 Jun 06 | To reflect buyback of 54,500 shares |
| 27 Jun 06 | To reflect buyback of 20,000 shares |
| 26 Jun 06 | To reflect buyback of 55,000 shares |
| 21 Jun 06 | To reflect buyback of 100,000 shares |
| 16 Jun 06 | To reflect buyback of 73,000 shares |
| 14 Jun 06 | To reflect buyback of 13,000 shares |
| 13 Jun 06 | To reflect buyback of 133,000 shares |
| 12 Jun 06 | To reflect buyback of 50,000 shares |
| 8 Jun 06 | To reflect buyback of 25,000 shares |
| 7 Jun 06 | To reflect buyback of 50,000 shares |
| 6 Jun 06 | To reflect buyback of 136,000 shares |
| 5 Jun 06 | To reflect buyback of 60,000 shares |
| 2 Jun 06 | To reflect buyback of 50,000 shares |
| 1 Jun 06 | To reflect buyback of 75,000 shares |
| 31 May 06 | To reflect buyback of 10,000 shares |
| 24 May 06 | To reflect buyback of 90,000 shares |
| 22 May 06 | To reflect buyback of 323,000 shares |
| 19 May 06 | To reflect buyback of 60,000 shares |
| 18 May 06 | To reflect buyback of 1,180,000 shares |
| 17 May 06 | To reflect buyback of 105,000 shares |
| 16 May 06 | To reflect buyback of 140,000 shares |
| 12 May 06 | To reflect buyback of 60,000 shares |
| 11 May 06 | To reflect buyback of 25,000 shares |
| 10 May 06 | To reflect buyback of 64,500 shares |
| 9 May 06 | To reflect buyback of 75,000 shares |
| 8 May 06 | To reflect buyback of 90,000 shares |
| 5 May 06 | To reflect buyback of 143,000 shares |
| 4 May 06 | To reflect buyback of 190,000 shares |
| 25 Apr 06 | To reflect buyback of 50,000 shares |
| 13 Apr 06 | To reflect buyback of 40,000 shares |
| 11 Apr 06 | To reflect buyback of 50,000 shares |
| 6 Apr 06 | To reflect buyback of 330,000 shares |
| 5 Apr 06 | To reflect buyback of 25,000 shares |
| 30 Mar 06 | To reflect buyback of 250,000 shares |
| 7 Mar 06 | To reflect buyback of 63,500 shares |
| 14 Feb 06 | To reflect buyback of 288,000 shares |
| 9 Feb 06 | To reflect buyback of 235,000 shares |
| 8 Feb 06 | To reflect buyback of 350,000 shares |
| 13 Dec 05 | To reflect buyback of 90,000 shares |
| 16 Nov 05 | To reflect buyback of 180,000 shares |
| 26 Jul 05 | To reflect buyback of 100,000 shares |
| 20 Jul 05 | To reflect buyback of 75,000 shares |
| 27 Jun 05 | To reflect buyback of 82,000 shares |
| 22 Jun 05 | To reflect buyback of 100,000 shares |
| 24 May 05 | To reflect buyback of 50,000 shares |
| 10 May 05 | To reflect buyback of 85,000 shares |
| 28 Apr 05 | To reflect buyback of 200,000 shares |
| 26 Apr 05 | To reflect buyback of 80,000 shares |
| 25 Apr 05 | To reflect buyback of 100,000 shares |
| 10 Mar 05 | To reflect buyback of 100,000 shares |
| 11 Jan 05 | To reflect buyback of 1,000,000 shares |
| 6 Jan 05 | To reflect buyback of 1,000,000 shares |
| 24 Nov 04 | To reflect buyback of 125,000 shares |
| 26 Oct 04 | To reflect buyback of 310,000 shares |
| 22 Oct 04 | To reflect buyback of 50,000 shares |
| 18 Oct 04 | To reflect buyback of 60,000 shares |
| 15 Oct 04 | To reflect buyback of 55,000 shares |
| 14 Oct 04 | To reflect buyback of 150,000 shares |
| 21 Sep 04 | To reflect buyback of 200,000 shares |
| 20 Sep 04 | To relfect buyback of 300,000 shares |
| 16 Sep 04 | To reflect buyback of 220,000 shares |
| 8 Sep 04 | To reflect US Tracker buyback of 190,000 shares |