| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 108 | 86 |
| 2015 | 113 | 100 |
| 2014 | 132 | 98 |
| 2013 | 130 | 98 |
| 2012 | 120 | 101 |
| 2011 | 126 | 95 |
| 2010 | 103 | 96 |
| 2009 | 71 | 105 |
| 2008 | 92 | 103 |
| 2007 | 65 | 107 |
| 2006 | 52 | 107 |
| 2005 | 40 | 108 |
| 2004 | 33 | 112 |
| 2003 | 26 | 117 |
| 2002 | 23 | 112 |
| 2001 | 27 | 103 |
| 2000 | 31 | 97 |
| 1999 | 31 | 97 |
| 1998 | 44 | 87 |
| 1997 | 47 | 80 |
| 1996 | 49 | 78 |
| 1995 | 51 | 73 |
| 1994 | 49 | 68 |
| 1993 | 39 | 76 |
| 1992 | 28 | 82 |
| 1991 | 27 | 81 |