evidence: Less than half (45%) of the 2.6 million hourly workers who were at or below the federal minimum in 2015 were ages 16 to 24. An additional 23.3% are ages 25 to 34, according to the Bureau of Labor Statistics; both shares have stayed more or less constant over the past decade. That 2.6 million represents less than 2% of all wage and salary workers. (See more about the demographics of minimum-wage workers.) [...] The restaurant/food service industry is the single biggest employer of near-minimum-wage workers. Our analysis also found that 3.75 million people making near-minimum wages (about 18% of the total) worked in that industry. Among near-minimum workers aged 30 and younger, about 2.5 million (or nearly a quarter of all near-minimum workers in that age bracket) work in restaurants or other food-service industries. But because many of those workers presumably are tipped, their actual gross pay may be above $10.10 an hour. (Federal law, as well as wage laws in many states, allows tipped employees to be paid less as long as "tip credits" bring their pay up to at least the applicable minimum.)