| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2013 | 816.1 | 64 |
| 2012 | 820.2 | 64 |
| 2011 | 788.8 | 64 |
| 2010 | 766.4 | 61 |
| 2009 | 762.8 | 60 |
| 2008 | 764.5 | 62 |
| 2007 | 745.9 | 59 |
| 2006 | 726.9 | 57 |
| 2005 | 693.8 | 55 |
| 2004 | 656.6 | 53 |
| 2003 | 623.2 | 52 |
| 2002 | 597.2 | 49 |
| 2001 | 579.3 | 47 |
| 2000 | 555.3 | 47 |
| 1999 | 534.9 | 48 |
| 1998 | 482.3 | 50 |
| 1997 | 458.7 | 51 |
| 1996 | 422.4 | 53 |
| 1995 | 390.6 | 54 |
| 1994 | 362.7 | 52 |
| 1993 | 338.3 | 52 |
| 1992 | 316.8 | 53 |
| 1991 | 301.4 | 53 |
| 1990 | 294.5 | 54 |
| 1989 | 278.4 | 49 |
| 1988 | 258.1 | 47 |
| 1987 | 235.1 | 48 |
| 1986 | 212.4 | 47 |