| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2012 | 3761.8 | 19 |
| 2011 | 5056.4 | 18 |
| 2010 | 4396 | 18 |
| 2009 | 3903.2 | 18 |
| 2008 | 6417.5 | 17 |
| 2007 | 9688.3 | 15 |
| 2006 | 6771.2 | 15 |
| 2005 | 4639.5 | 15 |
| 2004 | 4124.3 | 15 |
| 2003 | 2638.1 | 15 |
| 2002 | 2185.2 | 14 |
| 2001 | 3015.9 | 12 |
| 2000 | 3900.4 | 14 |
| 1999 | 2382.4 | 15 |
| 1998 | 2036.9 | 13 |
| 1997 | 1761.7 | 14 |
| 1996 | 1369 | 15 |
| 1995 | 932 | 12 |
| 1994 | 854.1 | 16 |
| 1993 | 435.9 | 19 |
| 1992 | 283.9 | 15 |
| 1991 | 216.6 | 17 |
| 1990 | 175.7 | 17 |
| 1989 | 174.2 | 13 |
| 1988 | 187.5 | 12 |