How come if unemployment is down,down,down, then why are Food Stamps Up, Up, Up?

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.
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.
Mississippi was the state with the largest share of its population relying on food stamps — 22% — though Washington, DC was a bit higher overall at 23%.
See more here