年度关税平均水平(%)1998 17.3 199916.7 200016.4 200115.3 200212.0 200311.3 200410.4 20059.9 20069.9 20079.8 20089.8 20099.8 20109.8 20119.8 20129.8 20139.8 20149.8 20159.8 20169.8