| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 137 | 69 |
| 2015 | 129 | 75 |
| 2014 | 139 | 79 |
| 2013 | 127 | 82 |
| 2012 | 124 | 82 |
| 2011 | 133 | 78 |
| 2010 | 118 | 75 |
| 2009 | 104 | 78 |
| 2008 | 141 | 77 |
| 2007 | 123 | 75 |
| 2006 | 104 | 76 |
| 2005 | 88 | 74 |
| 2004 | 80 | 71 |
| 2003 | 62 | 73 |
| 2002 | 49 | 77 |
| 2001 | 47 | 76 |
| 2000 | 44 | 76 |
| 1999 | 43 | 74 |
| 1998 | 45 | 70 |
| 1997 | 40 | 75 |
| 1996 | 46 | 67 |
| 1995 | 45 | 64 |
| 1994 | 43 | 60 |
| 1993 | 39 | 56 |
| 1992 | 46 | 54 |