| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 263.9 | 90 |
| 2015 | 275.9 | 98 |
| 2014 | 258.4 | 102 |
| 2013 | 205 | 110 |
| 2012 | 180.5 | 112 |
| 2011 | 154.2 | 117 |
| 2010 | 126.2 | 117 |
| 2009 | 120.9 | 115 |
| 2008 | 140.2 | 115 |
| 2007 | 133.4 | 111 |
| 2006 | 105.8 | 110 |
| 2005 | 81.5 | 115 |
| 2004 | 62.6 | 123 |
| 2003 | 53.1 | 125 |
| 2002 | 48.1 | 117 |
| 2001 | 45.9 | 118 |
| 2000 | 46.4 | 115 |
| 1999 | 51.7 | 111 |
| 1998 | 51.5 | 112 |
| 1997 | 54.2 | 106 |
| 1996 | 52.8 | 104 |
| 1995 | 54 | 98 |
| 1994 | 52.1 | 92 |
| 1993 | 46.2 | 97 |
| 1992 | 40.4 | 99 |
| 1991 | 31.8 | 109 |
| 1990 | 25.4 | 120 |
| 1989 | 22 | 104 |
| 1988 | 18.9 | 104 |
| 1987 | 15.8 | 105 |
| 1986 | 13.4 | 106 |