| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 405.1 | 76 |
| 2015 | 407.8 | 87 |
| 2014 | 490.1 | 83 |
| 2013 | 503.9 | 84 |
| 2012 | 475.3 | 83 |
| 2011 | 536.2 | 73 |
| 2010 | 453.8 | 78 |
| 2009 | 493.9 | 72 |
| 2008 | 615.9 | 69 |
| 2007 | 500.8 | 67 |
| 2006 | 368.3 | 71 |
| 2005 | 315 | 70 |
| 2004 | 314.3 | 67 |
| 2003 | 249.2 | 67 |
| 2002 | 190.3 | 70 |
| 2001 | 141.4 | 79 |
| 2000 | 68.3 | 101 |
| 1999 | 196.3 | 68 |
| 1998 | 199.7 | 70 |
| 1997 | 275.8 | 60 |
| 1996 | 234.7 | 63 |
| 1995 | 179.2 | 67 |