South Korea's energy imports inched down last year from a year earlier, mostly due to lower demand for crude oil, customs data showed Thursday. According to the data from the Korea Customs Service (KCS), South Korea's energy imports shrank 0.7 percent on-year in 2013. Crude oil imports dropped 4.8 percent, while those of coal and natural gas rose 0.8 percent and 7.7 percent, respectively.