| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 26 | 101 |
| 2015 | 27 | 119 |
| 2014 | 29 | 117 |
| 2013 | 30 | 118 |
| 2012 | 30 | 118 |
| 2011 | 31 | 117 |
| 2010 | 30 | 112 |
| 2009 | 28 | 110 |
| 2008 | 45 | 105 |
| 2007 | 36 | 108 |
| 2006 | 26 | 109 |
| 2005 | 20 | 110 |
| 2004 | 13 | 121 |
| 2003 | 11 | 124 |
| 2002 | 8 | 125 |
| 2001 | 7 | 125 |
| 2000 | 7 | 127 |
| 1999 | 5 | 128 |
| 1998 | 5 | 125 |
| 1997 | 5 | 126 |
| 1996 | 5 | 123 |
| 1995 | 5 | 128 |
| 1994 | 5 | 105 |
| 1993 | 3 | 113 |
| 1992 | 5 | 101 |
| 1991 | 10 | 87 |
| 1990 | 11 | 83 |