Looking at changes in income for the various strata from 1999 to 2005, there is a clear decline in the disposable income of the lowest group (Group 1), with 2005 incomes 6.5 % lower than in 1999. Households in Groups 2, 3, and 4 also experienced negative growth, falling on average by about 0.2 %.
（見表）觀察 1999 到 2005 年之間不同級距的所得增減，所得最低的第一級家庭，可支配所得呈現負成長的趨勢明顯，2005 年所得反較 1999 年萎縮了千分之 65；而中間的二、三、四級家戶，在同一段時間內也呈現負成長，平均幅度為千分之 2。