| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 116.2 | 111 |
| 2015 | 118.1 | 125 |
| 2014 | 137.6 | 129 |
| 2013 | 133.3 | 131 |
| 2012 | 128.3 | 127 |
| 2011 | 125.4 | 127 |
| 2010 | 115.3 | 124 |
| 2009 | 110.3 | 123 |
| 2008 | 146.5 | 114 |
| 2007 | 110.4 | 116 |
| 2006 | 74 | 126 |
| 2005 | 56.1 | 133 |
| 2004 | 41.3 | 138 |
| 2003 | 33.1 | 141 |
| 2002 | 27.9 | 141 |
| 2001 | 25.6 | 136 |
| 2000 | 24.3 | 135 |
| 1999 | 23.8 | 135 |
| 1998 | 25.3 | 135 |
| 1997 | 22.6 | 138 |
| 1996 | 21.2 | 141 |
| 1995 | 20.3 | 136 |
| 1994 | 17.6 | 133 |
| 1993 | 13.6 | 136 |
| 1992 | 15.5 | 133 |
| 1991 | 24.7 | 122 |
| 1990 | 25.1 | 121 |