It is to the average increase rate 1990 from 1985 4. 6 % , and fall to year of average increase rate 1996 from 1990 for 1. 5 % , to recently its grow substantially to present passivation.

• 自1985年至1990年的平均增长率为4．6%25，而从1990年至1996年的年平均增长率降为1．5%25，到最近其增长大体上呈现钝化。