| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 990.8 | 52 |
| 2015 | 927.5 | 62 |
| 2014 | 1381.8 | 55 |
| 2013 | 2002.4 | 50 |
| 2012 | 2126.2 | 46 |
| 2011 | 1739.4 | 50 |
| 2010 | 1415 | 52 |
| 2009 | 1191.9 | 51 |
| 2008 | 1943.7 | 42 |
| 2007 | 1506 | 45 |
| 2006 | 1108.2 | 49 |
| 2005 | 854.2 | 51 |
| 2004 | 600.1 | 56 |
| 2003 | 488.4 | 56 |
| 2002 | 405.4 | 56 |
| 2001 | 373.9 | 56 |
| 2000 | 296.9 | 59 |
| 1999 | 298.6 | 57 |
| 1998 | 428.4 | 54 |
| 1997 | 516.8 | 48 |
| 1996 | 457 | 50 |
| 1995 | 497 | 48 |
| 1994 | 542.1 | 42 |
| 1993 | 658.5 | 36 |
| 1992 | 724.7 | 35 |
| 1991 | 757.8 | 34 |
| 1990 | 823.3 | 34 |
| 1989 | 827.6 | 30 |