| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 453.8 | 31 |
| 2015 | 451.4 | 34 |
| 2014 | 448 | 35 |
| 2013 | 450.1 | 36 |
| 2012 | 459.2 | 36 |
| 2011 | 474.8 | 35 |
| 2010 | 493.6 | 34 |
| 2009 | 500.2 | 33 |
| 2008 | 487.4 | 33 |
| 2007 | 485.3 | 33 |
| 2006 | 482.3 | 32 |
| 2005 | 483.4 | 31 |
| 2004 | 470.7 | 30 |
| 2003 | 457.4 | 30 |
| 2002 | 450.2 | 31 |
| 2001 | 438.7 | 32 |
| 2000 | 423.6 | 32 |
| 1999 | 405.7 | 31 |
| 1998 | 392.3 | 31 |
| 1997 | 367.8 | 31 |
| 1996 | 358.6 | 31 |
| 1995 | 348.4 | 31 |
| 1994 | 345 | 30 |
| 1993 | 330.7 | 31 |
| 1992 | 331.5 | 29 |
| 1991 | 334.7 | 29 |
| 1990 | 305.3 | 30 |
| 1989 | 293.1 | 26 |
| 1988 | 275.3 | 26 |
| 1987 | 253.5 | 26 |
| 1986 | 244.2 | 25 |