| y | x | |
| 1979 | 281 | 4038.2 |
| 1980 | 399.5 | 4517.8 |
| 1981 | 523.7 | 4860.3 |
| 1982 | 675.4 | 5301.8 |
| 1983 | 892.5 | 5957.4 |
| 1984 | 1214.7 | 7206.7 |
| 1985 | 1622.6 | 8989.1 |
| 1986 | 2237.6 | 10201.4 |
| 1987 | 3037.3 | 11954.5 |
| 1988 | 3801.5 | 14922.3 |
| 1989 | 5146.9 | 16917.8 |
| 1990 | 7034.2 | 18598.4 |
| 1991 | 9107 | 21662.5 |
| 1992 | 11545.4 | 26651.9 |
| 1993 | 14762.4 | 34560.5 |
| 1994 | 21518.8 | 46670 |
| 1995 | 29662.3 | 57494.9 |
| 1996 | 38520.8 | 66850.5 |
| 1997 | 46279.8 | 73142.7 |
| 1998 | 53407.5 | 76967.2 |
| 1999 | 59621.8 | 80579.4 |
| 2000 | 64332.4 | 88228.1 |
| 2001 | 73762.4 | 94346.4 |
1990年为分界


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