| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 200.17 | 104 |
| 2015 | 180.5 | 109 |
| 2014 | 167.78 | 117 |
| 2013 | 154.5 | 119 |
| 2012 | 140.38 | 124 |
| 2011 | 128.3 | 128 |
| 2010 | 112.42 | 126 |
| 2009 | 104.02 | 124 |
| 2008 | 103.52 | 127 |
| 2007 | 86.39 | 128 |
| 2006 | 72.75 | 129 |
| 2005 | 62.93 | 129 |
| 2004 | 53.38 | 130 |
| 2003 | 46.58 | 130 |
| 2002 | 42.84 | 126 |
| 2001 | 39.84 | 127 |
| 2000 | 36.54 | 128 |
| 1999 | 35.17 | 128 |
| 1998 | 31.2 | 134 |
| 1997 | 34.43 | 130 |
| 1996 | 35.07 | 127 |
| 1995 | 34.41 | 123 |
| 1994 | 27.91 | 122 |
| 1993 | 25.34 | 124 |