Retail salespersons and cashiers largest occupation in U.S.

The 10 largest occupations accounted for 21 percent of total employment in May 2013.

The largest occupations also included combined food preparation and serving workers, including fast food; general office clerks; registered nurses; waiters and waitresses; and customer service representatives.

Officials said most of the largest occupations were relatively low paying. Of the 10 largest occupations, only registered nurses, with an annual mean wage of $68,910, had an average wage above the U.S.-all occupations mean wage of $22.33 per hour or $46,440 annually.