I was reading an articles on kids doing mma in america and it stated an estimated 3 million kids participate in mma in America. I also notice how many American guys study and know bjj and to a lesser extent do mma.
How many people in America actually train bjj and also mma? What is the chance that I might encounter a bjj practitioner? What percentage of americans do bjj e.g. how does 1 in every 100 sound?