这比收入处于中位数，年收入仅为5.2万美元的家庭的平均税负还低。
This is lower than the average paid by the median household , which earns just $ 52000 a year .
上市公司总体税负存在行业差异，2004年度采掘业、房地产业等五个行业平均总体税负较高；
There is different form industry , mining and estate are higher ;
平均税负