I also found some 1995 and 1996 stats.
http://www.autoracing1.com/Images/20...1996.07-03.jpg
* The Daytona 500 on CBS got a 7.8 rating and 7.4 million households in 1995, and a 9.2 rating an 8.8 million households in 1996.
* The Atlanta 500 on ABC got 4.5/4.3M hh in 1995, and 5.4/5.1M hh in 1996.
* Talladega on ESPN got 5.2/3.4M hh in 1995, and 5.5/3.7M hh in 1996.
* Rockingham on TNN got 5.0/3.0M hh in 1995, and 5.4/3.5M hh in 1996.