| 时间 | 值 （亿元） | 世界排名 |
|---|---|---|
| 2016 | 24.4 | 129 |
| 2015 | 23.3 | 142 |
| 2014 | 21.8 | 145 |
| 2013 | 20.5 | 147 |
| 2012 | 19.7 | 147 |
| 2011 | 20.8 | 148 |
| 2010 | 20.7 | 150 |
| 2009 | 20.1 | 150 |
| 2008 | 19.4 | 155 |
| 2007 | 18.5 | 154 |
| 2006 | 16.5 | 153 |
| 2005 | 16.1 | 152 |
| 2004 | 17.2 | 148 |
| 2003 | 14.3 | 147 |
| 2002 | 13.5 | 146 |
| 2001 | 12.2 | 145 |
| 2000 | 11 | 146 |
| 1999 | 9.6 | 143 |
| 1998 | 8.5 | 142 |
| 1997 | 7.5 | 142 |
| 1996 | 6.9 | 139 |
| 1995 | 6.2 | 138 |
| 1994 | 5.6 | 132 |
| 1993 | 5 | 130 |
| 1992 | 4.1 | 121 |
| 1991 | 3.8 | 120 |
| 1990 | 3.6 | 116 |
| 1989 | 3.3 | 113 |
| 1988 | 3.1 | 108 |
| 1987 | 2.5 | 108 |
| 1986 | 2.3 | 108 |