WWE Monday Night Raw averaged a 2.99 cable rating in 2012. This is down from the 3.21 cable rating the show averaged in 2011.
The biggest shift for the show in 2012 was moving to a new three hour format beginning on 7/23. Over the course of 24 weeks in the new format the show averaged 4.07 million viewers.
Below are Raw rating averages since 1998 courtesy of Gerweck.net.
1998: 4.35
1999: 5.90
2000: 5.88 * Show moves to TNN on 9/25 (now Spike TV)
2001: 4.64
2002: 4.01
2003: 3.76
2004: 3.67
2005: 3.81 * Show moves back to USA on 10/3
2006: 3.90
2007: 3.61
2008: 3.27
2009: 3.57
2010: 3.28
2011: 3.21
2012: 2.99