| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 103 | 116 |
| 2015 | 107.2 | 132 |
| 2014 | 118.3 | 133 |
| 2013 | 121 | 136 |
| 2012 | 114 | 134 |
| 2011 | 114.4 | 133 |
| 2010 | 103.1 | 131 |
| 2009 | 110.5 | 121 |
| 2008 | 122.7 | 119 |
| 2007 | 89.4 | 123 |
| 2006 | 64 | 131 |
| 2005 | 59.1 | 132 |
| 2004 | 50.1 | 132 |
| 2003 | 59.7 | 117 |
| 2002 | 46.9 | 120 |
| 2001 | 46.8 | 117 |
| 2000 | 41.6 | 120 |
| 1999 | 40.1 | 121 |
| 1998 | 40.3 | 122 |
| 1997 | 38.3 | 128 |
| 1996 | 42.2 | 117 |
| 1995 | 34 | 125 |
| 1994 | 32 | 120 |
| 1993 | 36.8 | 106 |
| 1992 | 32.7 | 113 |
| 1991 | 28.8 | 117 |
| 1990 | 34.3 | 103 |
| 1989 | 25.9 | 96 |
| 1988 | 26.1 | 93 |
| 1987 | 27.2 | 92 |
| 1986 | 33.7 | 85 |