One is found in the Distribution of Household Income and Federal Taxes, published by the US Congressional Budget Office (CBO) last year. After-tax real income for the lowest quintile of US households was 49% higher in 2010 than in 1979, growing at an average rate of 1.3% annually.
这些都是真事，但需要做一些重要的警告。其中之一见美国国会预算办公室（CBO）去年发布的《家庭收入和联邦税负分布》（Distribution of Household Income and Federal Taxes）。2010年，美国收入最低的五分之一家庭的真实税后收入比1979年高了49%，平均每年增长1.3%。中间五分之三家庭税后收入增加了40%——相当于平均每年增长1.1%。