2008년부터 5년간 지자체간 격차가 여전히 존재하는 것으로 분석되었으나, 최대-최소값 차이는 점차적으로 줄어들고 있었다.
It was analyzed that the gap between local governments still existed for five years from 2008, but the gap between maximum and minimum values was gradually decreasing.