Mhh, great info. I would also have expected Tennis and maybe cycling on the charts.
American Football is a great sport, if you do understand it. It is like playing chess with great athletes trying to hurt each other as much as possible!
There is a reason that not so many games are played during the regular season, their bodies just can't cope with more games!
Once you do appreciate the games, you will discover the beauty of it. Bot for most people it is unknown and therefor unloved!