| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 377.45 | 87 |
| 2015 | 371.6 | 91 |
| 2014 | 442.11 | 88 |
| 2013 | 455.2 | 88 |
| 2012 | 407.42 | 89 |
| 2011 | 464.67 | 80 |
| 2010 | 394.6 | 83 |
| 2009 | 426.17 | 78 |
| 2008 | 492.6 | 75 |
| 2007 | 402.9 | 77 |
| 2006 | 306.08 | 78 |
| 2005 | 262.52 | 79 |
| 2004 | 248.61 | 73 |
| 2003 | 211.89 | 74 |
| 2002 | 161.17 | 78 |
| 2001 | 122.67 | 84 |
| 2000 | 65.4 | 106 |
| 1999 | 184.09 | 70 |
| 1998 | 182.84 | 72 |
| 1997 | 241.48 | 64 |
| 1996 | 209.49 | 68 |
| 1995 | 167.5 | 70 |