Since the program started in 1982, only three formal studies over the nutritional impact of the benefits provided to each family have been publicly released, in 1985, 1993, and 1996, respectively.[55] All studies were designed to analyze the impact of the program with respect to the previous food stamps program, focusing on changes in household nutrient availability, while the 1985 and 1993 studies also focused on changes in household food expenditures (the amount of money households spent on acquiring food).[56]