| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 136 | 108 |
| 2015 | 127.6 | 124 |
| 2014 | 141.4 | 126 |
| 2013 | 137.2 | 126 |
| 2012 | 124.7 | 130 |
| 2011 | 116 | 132 |
| 2010 | 99.2 | 132 |
| 2009 | 96.3 | 130 |
| 2008 | 97.4 | 130 |
| 2007 | 77.4 | 132 |
| 2006 | 66.5 | 130 |
| 2005 | 63.4 | 128 |
| 2004 | 55.4 | 130 |
| 2003 | 47.7 | 129 |
| 2002 | 36.1 | 134 |
| 2001 | 32 | 131 |
| 2000 | 30.4 | 131 |
| 1999 | 34.3 | 129 |
| 1998 | 32.3 | 131 |
| 1997 | 28.3 | 134 |
| 1996 | 30.3 | 132 |
| 1995 | 26.8 | 131 |
| 1994 | 21 | 127 |
| 1993 | 26.1 | 119 |
| 1992 | 24.8 | 118 |
| 1991 | 35.4 | 106 |
| 1990 | 35.2 | 101 |
| 1989 | 30.1 | 93 |
| 1988 | 30.4 | 90 |
| 1987 | 27.7 | 91 |
| 1986 | 24.4 | 92 |