The MacArthur Fellowship is an award issued by the MacArthur Foundation[?]. It is awarded each year to typically 20-40 citizens or residents of the USA.
Recipients must "show exceptional merit and promise for continued and enhanced creative work". As of 2002 the award consists of quarterly payments for five years totalling $500,000.
... age of 18, 34.0% from 18 to 24, 17.6% from 25 to 44, 20.5% from 45 to 64, and 14.1% who are 65 years of age or older. The median age is 28 years. For every 100 females ...