| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 271 | 100 |
| 2014 | 278.7 | 99 |
| 2013 | 271.3 | 102 |
| 2012 | 250.9 | 101 |
| 2011 | 220.6 | 105 |
| 2010 | 209.3 | 100 |
| 2009 | 185.9 | 101 |
| 2008 | 207.6 | 99 |
| 2007 | 170.4 | 102 |
| 2006 | 144 | 102 |
| 2005 | 128.6 | 100 |
| 2004 | 109.8 | 100 |
| 2003 | 93 | 101 |
| 2002 | 83 | 101 |
| 2001 | 71.6 | 100 |
| 2000 | 70.2 | 99 |
| 1999 | 55.7 | 107 |
| 1998 | 61.4 | 104 |
| 1997 | 57.4 | 103 |
| 1996 | 53.9 | 101 |
| 1995 | 51.8 | 101 |
| 1994 | 51.7 | 94 |
| 1993 | 50.4 | 95 |
| 1992 | 53.4 | 93 |
| 1991 | 51.1 | 94 |
| 1990 | 33.4 | 104 |
| 1989 | 34.4 | 90 |
| 1988 | 30.4 | 89 |
| 1987 | 28.8 | 90 |
| 1986 | 26.3 | 91 |