A column chart depicting the percentage of the US population who use fitness centers (per generation). The data is as follows: Baby Boomers ( born between 1946 - 1964) with 42% Generation X (born between 1965 - 1980) with 54% Millennials (born between 1981 - 1996) with 72% Generation Z (born between 1997 - 2012) with 73%