| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 560.2 | 5 |
| 2015 | 507.9 | 7 |
| 2014 | 508.2 | 7 |
| 2013 | 459.1 | 9 |
| 2012 | 463.7 | 9 |
| 2011 | 483.4 | 8 |
| 2010 | 462.6 | 7 |
| 2009 | 395.1 | 9 |
| 2008 | 312.2 | 10 |
| 2007 | 290.2 | 10 |
| 2006 | 239.8 | 11 |
| 2005 | 229.8 | 10 |
| 2004 | 204.1 | 10 |
| 2003 | 165.6 | 10 |
| 2002 | 148.1 | 9 |
| 2001 | 144.5 | 9 |
| 2000 | 140.5 | 9 |
| 1999 | 138.1 | 9 |
| 1998 | 116.9 | 10 |
| 1997 | 112 | 12 |
| 1996 | 98.9 | 13 |
| 1995 | 94.5 | 13 |
| 1994 | 88.7 | 14 |
| 1993 | 80.2 | 15 |
| 1992 | 79.3 | 14 |
| 1991 | 80 | 15 |
| 1990 | 102.8 | 11 |
| 1989 | 103.1 | 10 |
| 1988 | 109.1 | 8 |
| 1987 | 108.7 | 8 |
| 1986 | 94.1 | 8 |