In 50 years, the share of personal income spent on all food by Americans fell about 50 percent to 9.6 percent. But in the last decade, income spent on food has actually gone up a bit to 9.9 percent according to the Economic Research Service.
As more Americans go out to eat, they spend about half of their food budget on restaurants or other venues. But food price inflation has been more than overall inflation in the last few years making food more costly.
According to Washington State University, the U.S. has one of the smallest share on income spent on food in the world, some countries reach from 30 percent to 50 percent of their budgets on food.