Food-stamp use rose 2.4% in the U.S. in May from a year earlier, with more than 15% of the U.S. population receiving benefits. (See an interactive map with data on use since 1990.)

One of the federal government’s biggest social welfare programs, which expanded when the economy convulsed, isn’t shrinking back alongside the recovery.

Food stamp rolls were up 0.2% from the prior month, the U.S. Department of Agriculture reported in data that aren’t adjusted for seasonal variations. Though annual growth continues, the pace has slowed since the depths of the recession.

The number of recipients in the food stamp program, formally known as the Supplemental Nutrition Assistance Program (SNAP), is at 47.6 million, or nearly one in six Americans.