第一個系恩格爾系數 ， 解釋了每天生活必須的花費 百分點有所減少 在過去十年內 對比人均家庭收入 下降了 37 % 。
The first is Engel's coefficient, which explains the reduction in the percentage points of daily necessities spent on living in contrast to a 37% decrease in per capita household income over the past decade.