□ The Export Price Index ( won basis ) increased by 3 . 1 % month - on - month in December 2010 . o The index rose by 4 . 3 % in year - on - year terms . o On an annual average basis , the index fell by 2 . 6 % year - on - year in 2010 . □ The Import Price Index ( won basis ) rose by 4 . 7 % month - on - month in December 2010 . o Year - on - year , it increased by 12 . 7 %. o On an annual average basis , the index rose by 5 . 3 % year - on - year during 2010 . [ Source : Bank of Korea ]