| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 142.3 | 119 |
| 2014 | 155.4 | 117 |
| 2013 | 147.4 | 122 |
| 2012 | 152 | 119 |
| 2011 | 138.9 | 121 |
| 2010 | 127.4 | 116 |
| 2009 | 107.2 | 125 |
| 2008 | 95.5 | 131 |
| 2007 | 92.1 | 122 |
| 2006 | 76.7 | 124 |
| 2005 | 72.5 | 122 |
| 2004 | 67.6 | 119 |
| 2003 | 53.8 | 124 |
| 2002 | 34.3 | 135 |
| 2001 | 37.8 | 125 |
| 2000 | 40.5 | 124 |
| 1999 | 41.4 | 119 |
| 1998 | 41.9 | 120 |
| 1997 | 44.2 | 118 |
| 1996 | 41.7 | 118 |
| 1995 | 41.1 | 113 |
| 1994 | 36.8 | 111 |
| 1993 | 33.1 | 113 |
| 1992 | 36.5 | 103 |
| 1991 | 31.9 | 108 |
| 1990 | 29.9 | 111 |
| 1989 | 24.6 | 98 |
| 1988 | 24.7 | 96 |
| 1987 | 24.2 | 94 |
| 1986 | 16.3 | 101 |