Over the past 30 years, grocery store prices have risen 4.5 percent above economy-wide prices, indicating that food has become relatively more expensive than some other consumer goods... Real prices for fresh fruits and vegetables grew the most among all major food categories, increasing just over 40 percent... Over the same time period, real prices for fats and oils, sugar and sweets, and nonalcoholic beverages grew less than overall inflation.
https://www.ers.usda.gov/amber-waves/2015/july/growth-in-inf...