In the inflation-dependent economic stimulus of the Yun Seok-yeol administration, led by a 9.6% rise in utility bills, food returned to the Lee Myung-bak high-inflation system with a 2.5% rise. The consumer price index rose 5.4% in May, a sharp rise from 4% in March, and overtook the 8.3% rise in industrial products under the system of a 9.6% surge in electricity, gas, and water utility rates. b..