| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 81 | 92 |
| 2015 | 80 | 108 |
| 2014 | 95 | 105 |
| 2013 | 93 | 107 |
| 2012 | 91 | 107 |
| 2011 | 84 | 108 |
| 2010 | 70 | 109 |
| 2009 | 64 | 106 |
| 2008 | 76 | 103 |
| 2007 | 57 | 109 |
| 2006 | 42 | 114 |
| 2005 | 32 | 118 |
| 2004 | 26 | 120 |
| 2003 | 20 | 124 |
| 2002 | 17 | 122 |
| 2001 | 17 | 122 |
| 2000 | 16 | 122 |
| 1999 | 14 | 120 |
| 1998 | 17 | 117 |
| 1997 | 16 | 120 |
| 1996 | 13 | 120 |
| 1995 | 9 | 128 |
| 1994 | 6 | 113 |
| 1993 | 5 | 113 |
| 1992 | 8 | 106 |
| 1991 | 20 | 81 |
| 1990 | 26 | 71 |