| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 182 | 74 |
| 2015 | 176 | 86 |
| 2014 | 204 | 85 |
| 2013 | 195 | 87 |
| 2012 | 181 | 88 |
| 2011 | 182 | 85 |
| 2010 | 152 | 85 |
| 2009 | 172 | 81 |
| 2008 | 232 | 71 |
| 2007 | 197 | 71 |
| 2006 | 138 | 75 |
| 2005 | 110 | 78 |
| 2004 | 92 | 79 |
| 2003 | 75 | 80 |
| 2002 | 60 | 82 |
| 2001 | 52 | 83 |
| 2000 | 49 | 86 |
| 1999 | 46 | 84 |
| 1998 | 42 | 85 |
| 1997 | 36 | 89 |
| 1996 | 33 | 87 |
| 1995 | 31 | 87 |