| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 70 | 106 |
| 2015 | 80 | 105 |
| 2014 | 100 | 102 |
| 2013 | 100 | 104 |
| 2012 | 99 | 98 |
| 2011 | 76 | 105 |
| 2010 | 57 | 103 |
| 2009 | 68 | 100 |
| 2008 | 56 | 111 |
| 2007 | 36 | 118 |
| 2006 | 26 | 125 |
| 2005 | 29 | 112 |
| 2004 | 33 | 103 |
| 2003 | 25 | 103 |
| 2002 | 21 | 104 |
| 2001 | 23 | 102 |
| 2000 | 18 | 111 |
| 1999 | 15 | 115 |
| 1998 | 10 | 129 |
| 1997 | 12 | 119 |
| 1996 | 13 | 117 |
| 1995 | 14 | 110 |
| 1994 | 15 | 102 |