The price of food in the U.S. is on the rise. According to the USDA, the Consumer Price Index (CPI) for "all food" increased 4 percent in 2007, the largest annual jump since 1990. This trend is continuing in 2008. This rapid inflation follows an extended period of stable food prices. From 1987 through 2007, food prices increased an average of 2.7 percent per year, excluding drought years of 1989 and 1990. During 2005 and 2006, food prices rose 2.4 percent. <<< Click on the subjects at left for a look at causes of food price increases and the impact they have on consumers. Credits:  CBS/Congressional Research Service/AP