按海关资料,在1998-2002年五年期间,我国镍的外贸总额:1998年为1.11亿美元,2002年达到4.81亿美元,五年内平均每年以44.4%的速度递增。其中进口额由1998年的1.07亿美元,增加到2002年的4.30亿美元,增加近三倍,年均递增率达 According to customs information, during the five-year period from 1998 to 2002, the total foreign trade volume of nickel in our country was 111 million U.S. dollars in 1998 and 481 million U.S. dollars in 2002. The average annual growth rate of nickel in China was 44.4 percent annually over the five years. Among them, the amount of imports increased from 107 million U.S. dollars in 1998 to 430 million U.S. dollars in 2002, nearly tripling the average annual rate of increase