In 2009, 33,490,000 people received food stamp benefits. As of October 2016, the last month reported for FY 2016, 44,219,123 people received food stamp benefits, an increase of about 10,729,000.
The U.S. population as of October 1, 2016 was 324,607,826, according to U.S. Census Bureau estimates. Therefore, the 44,219,123 people on food stamps represented 13.6 percent of the population.
The cost of food stamps to taxpayers also increased over the time Obama was in office. As of 2009, all food stamp recipients received up to $50.3 billion in benefits. As of 2016, that number has increased to $66.6 billion, an estimated increase of $16.3 billion.
The average monthly benefit for food stamp recipients, however, remains almost unchanged. In 2009, food stamp recipients received an average monthly benefit of $125.31, while in 2016 they received $125.51.