Not quite sure what got me started on this, but the numbers kind of surprised me. Baseball draws more spectators than anything else. College games draw more than professional sports. Motor sports draw a fraction of those.
What I was wondering were how many people are attend these games religiously. I'm guesstimating it's about half. Knowing how many season ticket holders there are would help, except that if the vibe isn't there, the entire high dollar section will be empty.
If you look at the total, it seems like everyone in country must have attended a game. However, divide that by 100 (to adjust for multiple games in one season and fans who follow more than one sport) and you get 3 million which is roughly one percent of the people in this country. Funny, one percent is also the number of people who die in this country every year.
The people spend something like $50 billion on sporting events every year. Last year probably didn't measure up.