| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 91 | 93 |
| 2015 | 120 | 96 |
| 2014 | 144 | 94 |
| 2013 | 138 | 95 |
| 2012 | 129 | 98 |
| 2011 | 122 | 97 |
| 2010 | 91 | 104 |
| 2009 | 75 | 102 |
| 2008 | 84 | 105 |
| 2007 | 68 | 106 |
| 2006 | 47 | 110 |
| 2005 | 38 | 111 |
| 2004 | 33 | 111 |
| 2003 | 27 | 114 |
| 2002 | 21 | 119 |
| 2001 | 22 | 109 |
| 2000 | 20 | 111 |
| 1999 | 22 | 107 |
| 1998 | 23 | 107 |
| 1997 | 20 | 112 |
| 1996 | 21 | 107 |
| 1995 | 22 | 99 |
| 1994 | 20 | 99 |
| 1993 | 20 | 96 |
| 1992 | 18 | 100 |
| 1991 | 17 | 102 |
| 1990 | 16 | 98 |