A friend of mine (another TKD practitioner) sent me this story:
Pretty general, but some good information nonetheless.
Martial arts have become a family affair—for moms, dads, and children of all ages. Today, almost half of the sport's 6 million participants are kids between the ages of 6 and 17, and women comprise one-third of the student body, according to the Sporting Goods Manufacturers Association. There are hundreds of styles of martial arts, such as kick-heavy karate, wrestlinglike jujitsu, and judo, in which an opponent may be held or thrown. Each delivers a great workout and is good for self-defense. But those aren't the only reasons families sign up.
Pretty general, but some good information nonetheless.