| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 367.9 | 10 |
| 2015 | 364.3 | 10 |
| 2014 | 372.9 | 10 |
| 2013 | 343.5 | 10 |
| 2012 | 319.5 | 12 |
| 2011 | 309.9 | 12 |
| 2010 | 281.8 | 12 |
| 2009 | 245.8 | 12 |
| 2008 | 260.7 | 11 |
| 2007 | 277.3 | 11 |
| 2006 | 251.8 | 10 |
| 2005 | 221.6 | 11 |
| 2004 | 178.3 | 11 |
| 2003 | 158.5 | 11 |
| 2002 | 141 | 10 |
| 2001 | 129.4 | 10 |
| 2000 | 138 | 10 |
| 1999 | 121 | 10 |
| 1998 | 104.6 | 11 |
| 1997 | 148.5 | 10 |
| 1996 | 164.1 | 7 |
| 1995 | 160.9 | 7 |
| 1994 | 135.2 | 9 |
| 1993 | 123.8 | 9 |
| 1992 | 116.1 | 10 |
| 1991 | 109.6 | 12 |
| 1990 | 101.1 | 12 |
| 1989 | 94.7 | 11 |
| 1988 | 77.3 | 11 |
| 1987 | 60.4 | 13 |
| 1986 | 53.3 | 12 |