If the median is the middle number, wouldn't that mean that around half of america makes less than $15/hr? The same wiki page says "slightly under 45% had incom

If the median is the middle number, wouldn't that mean that around half of america makes less than $15/hr? The same wiki page says "slightly under 45% had incomes below $25,000". So a raise to $15/hr would potentially impact half the county.