| 时间 | 值 （亿元） | 世界排名 |
|---|---|---|
| 2016 | 33.7 | 126 |
| 2015 | 34.2 | 140 |
| 2014 | 32.3 | 142 |
| 2013 | 31.8 | 144 |
| 2012 | 31.4 | 143 |
| 2011 | 30.6 | 144 |
| 2010 | 30.2 | 145 |
| 2009 | 30.1 | 146 |
| 2008 | 33.4 | 148 |
| 2007 | 32.3 | 148 |
| 2006 | 29 | 146 |
| 2005 | 26 | 144 |
| 2004 | 23.9 | 142 |
| 2003 | 22.5 | 142 |
| 2002 | 19.5 | 143 |
| 2001 | 18.5 | 141 |
| 2000 | 17.6 | 139 |
| 1999 | 16.6 | 135 |
| 1998 | 13.3 | 137 |
| 1997 | 11.6 | 139 |
| 1996 | 10.8 | 135 |
| 1995 | 11 | 132 |
| 1994 | 9.2 | 129 |
| 1993 | 8.5 | 124 |
| 1992 | 7.9 | 114 |
| 1991 | 7.2 | 114 |
| 1990 | 6.2 | 110 |
| 1989 | 6 | 105 |
| 1988 | 5.3 | 102 |
| 1987 | 4.5 | 101 |
| 1986 | 3.3 | 101 |