| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 275.3 | 87 |
| 2015 | 273.3 | 99 |
| 2014 | 319.5 | 94 |
| 2013 | 312.2 | 94 |
| 2012 | 293.7 | 92 |
| 2011 | 296.3 | 93 |
| 2010 | 241.1 | 95 |
| 2009 | 265.9 | 92 |
| 2008 | 401.9 | 80 |
| 2007 | 367.8 | 78 |
| 2006 | 258.8 | 82 |
| 2005 | 193.7 | 84 |
| 2004 | 166.1 | 85 |
| 2003 | 132.2 | 88 |
| 2002 | 105.1 | 92 |
| 2001 | 92.2 | 92 |
| 2000 | 85.7 | 94 |
| 1999 | 82.7 | 92 |
| 1998 | 80.4 | 94 |
| 1997 | 71.2 | 98 |
| 1996 | 65.1 | 98 |
| 1995 | 60.6 | 97 |