[barrow-rider]

Outside of Christianity, and obesity -- which isn't a protected class IIRC -- I can't think of any that make up more than 51% of the population.

The US Black population is around 13%; Hispanic population is closer to 18-19%. Asian and Pacific Islander is around 5%. LBGT population is estimated at around 5-6%; transgender estimated at around 0.3%. Muslims are <2%, and Jews roughly the same. Old people, defined as those over 65, are around 17% and rising to around 24% because of the baby boom. Kids, defined as 0-14 years, are about 18-19%, and are unlikely to be in the company boardroom. About 19% of the population had some sort of disability, with the majority of those being older (50+).

In 2017, 80.4 million workers age 16 and older in the United States were paid at hourly rates, representing 58.3 percent of all wage and salary workers. Minimum wage isn't a protected class though.

[lawnchair_larry]

"Old people" is actually defined as over 40 as far as protected classes for age discrimination. There are probably more old people than women. Familial status is another.