| 时间 | 值 （亿元） | 世界排名 |
|---|---|---|
| 2005 | 26.1 | 143 |
| 2004 | 18.2 | 147 |
| 2003 | 40.2 | 132 |
| 2002 | 96.1 | 119 |
| 2001 | 32.9 | 131 |
| 2000 | 17.9 | 138 |
| 1999 | 12.3 | 142 |
| 1998 | 14.6 | 134 |
| 1997 | 25.7 | 122 |
| 1996 | 22 | 120 |
| 1995 | 19 | 119 |
| 1994 | 16.1 | 115 |
| 1993 | 15 | 113 |
| 1992 | 11.2 | 109 |
| 1991 | 14.7 | 99 |
| 1990 | 20.3 | 92 |
| 1989 | 43.2 | 82 |
| 1988 | 34.8 | 80 |
| 1987 | 28.8 | 81 |
| 1986 | 22.6 | 81 |