Sources:
*Nielsen Cassandra Ranking Report - Nov'86 to July '99 and Wrap Sweeps+, Nov '99 to May ‘08. Wtd Avg DMA HH Rtg, Primary Telecasts Only.
**Nielsen/NPower/P2+ unique viewer average: 1-minute qualifier, L+7, 11/1-11/28/07, 1/31-2/27/08, 4/24-5/21/08, excludes 11/23/07.
Last Updated: October 2008
*Nielsen Cassandra Ranking Report - Nov'86 to July '99 and Wrap Sweeps+, Nov '99 to May ‘08. Wtd Avg DMA HH Rtg, Primary Telecasts Only.
**Nielsen/NPower/P2+ unique viewer average: 1-minute qualifier, L+7, 11/1-11/28/07, 1/31-2/27/08, 4/24-5/21/08, excludes 11/23/07.
Last Updated: October 2008