| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 91 | 96 |
| 2015 | 90 | 102 |
| 2014 | 110 | 99 |
| 2013 | 103 | 100 |
| 2012 | 100 | 97 |
| 2011 | 111 | 90 |
| 2010 | 92 | 91 |
| 2009 | 88 | 90 |
| 2008 | 122 | 85 |
| 2007 | 97 | 85 |
| 2006 | 73 | 87 |
| 2005 | 71 | 84 |
| 2004 | 59 | 84 |
| 2003 | 48 | 83 |
| 2002 | 39 | 86 |
| 2001 | 34 | 88 |
| 2000 | 31 | 91 |
| 1999 | 33 | 86 |
| 1998 | 29 | 92 |
| 1997 | 23 | 96 |
| 1996 | 19 | 102 |
| 1995 | 11 | 119 |
| 1994 | 9 | 118 |
| 1993 | 4 | 140 |
| 1992 | 4 | 140 |