| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 276.77 | 93 |
| 2015 | 270.26 | 100 |
| 2014 | 313.52 | 98 |
| 2013 | 302.55 | 98 |
| 2012 | 281.2 | 96 |
| 2011 | 282.24 | 97 |
| 2010 | 237.57 | 98 |
| 2009 | 261.7 | 91 |
| 2008 | 355.96 | 83 |
| 2007 | 309.01 | 84 |
| 2006 | 214.47 | 85 |
| 2005 | 169.23 | 90 |
| 2004 | 143.73 | 90 |
| 2003 | 117.48 | 91 |
| 2002 | 95.46 | 96 |
| 2001 | 83.5 | 97 |
| 2000 | 79.38 | 102 |
| 1999 | 75.33 | 99 |
| 1998 | 71.75 | 98 |
| 1997 | 65.26 | 102 |
| 1996 | 59.7 | 103 |
| 1995 | 57.88 | 99 |