This document shows the TV viewership and cost of a 30-second ad for each Super Bowl from 1980-2003. While viewership fluctuated, rising to over 90 million by the late 1990s before dropping slightly, the cost of an ad steadily increased over this period, reaching over $2 million by 2003. There is not a strong correlation between viewership numbers and ad costs. Viewership is impacted by which teams are playing, as more popular franchises like the Bears, Cowboys, and Steelers led to higher ratings when they appeared. Meanwhile, advertisers are still willing to pay increasing amounts to reach the huge audience that even lower-viewed Super Bowls provide.