| 02/01/2012 | 02/07/2012 | 29.4% | 58.8% |
| 01/25/2012 | 01/31/2012 | 29.3% | 58.6% |
| 01/18/2012 | 01/24/2012 | 29.4% | 58.8% |
| 01/11/2012 | 01/17/2012 | 29.1% | 58.2% |
| 01/04/2012 | 01/10/2012 | 28.7% | 57.4% |
| 12/28/2011 | 01/03/2012 | 28.8% | 57.6% |
| 12/21/2011 | 12/27/2011 | 29.1% | 58.2% |
| 12/14/2011 | 12/20/2011 | 29.8% | 59.6% |
| 12/07/2011 | 12/13/2011 | 30.2% | 60.4% |
| 11/30/2011 | 12/06/2011 | 30.5% | 61.0% |
| 11/23/2011 | 11/29/2011 | 31.0% | 62.0% |
| 11/16/2011 | 11/22/2011 | 30.7% | 61.4% |
| 11/09/2011 | 11/15/2011 | 29.7% | 59.4% |
| 11/02/2011 | 11/08/2011 | 29.8% | 59.6% |
| 10/26/2011 | 11/01/2011 | 29.1% | 58.2% |
| 10/19/2011 | 10/25/2011 | 28.9% | 57.8% |
| 10/12/2011 | 10/18/2011 | 28.1% | 56.2% |
| 10/05/2011 | 10/11/2011 | 28.3% | 56.6% |
| 09/28/2011 | 10/04/2011 | 28.7% | 57.4% |
| 09/21/2011 | 09/27/2011 | 29.2% | 58.4% |
| 09/07/2011 | 09/20/2011 | 29.5% | 59.0% |
| 08/31/2011 | 09/06/2011 | 29.1% | 58.2% |
| 08/24/2011 | 08/30/2011 | 29.0% | 58.0% |
| 08/17/2011 | 08/23/2011 | 29.2% | 58.4% |
| 08/10/2011 | 08/16/2011 | 29.8% | 59.6% |
| 08/03/2011 | 08/09/2011 | 30.2% | 60.4% |
| 07/27/2011 | 08/02/2011 | 30.3% | 60.6% |
| 07/20/2011 | 07/26/2011 | 30.1% | 60.2% |
| 07/13/2011 | 07/19/2011 | 29.8% | 59.6% |
| 07/06/2011 | 07/12/2011 | 29.4% | 58.8% |
| 06/29/2011 | 07/05/2011 | 29.7% | 59.4% |
| 06/15/2011 | 06/28/2011 | 30.4% | 60.8% |
| 06/01/2011 | 06/14/2011 | 30.3% | 60.6% |
| 05/25/2011 | 05/31/2011 | 30.8% | 61.6% |
| 05/18/2011 | 05/24/2011 | 31.5% | 63.0% |
| 05/11/2011 | 05/17/2011 | 31.9% | 63.8% |
| 05/04/2011 | 05/10/2011 | 32.1% | 64.2% |
| 04/27/2011 | 05/03/2011 | 31.8% | 63.6% |
| 04/20/2011 | 04/26/2011 | 31.9% | 63.8% |
| 04/13/2011 | 04/19/2011 | 31.6% | 63.2% |
| 04/06/2011 | 04/12/2011 | 30.6% | 61.2% |
| 03/30/2011 | 04/05/2011 | 30.2% | 60.4% |
| 03/16/2011 | 03/29/2011 | 29.9% | 59.8% |
| 03/09/2011 | 03/15/2011 | 29.6% | 59.2% |
| 03/02/2011 | 03/08/2011 | 28.0% | 56.0% |
| 02/23/2011 | 03/01/2011 | 26.6% | 53.2% |
| 02/16/2011 | 02/22/2011 | 26.2% | 52.4% |
| 02/09/2011 | 02/15/2011 | 26.0% | 52.0% |
| 02/07/2011 | 02/08/2011 | 25.2% | 50.4% |