| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 678 | 63 |
| 2015 | 679.1 | 70 |
| 2014 | 655.9 | 70 |
| 2013 | 601.6 | 72 |
| 2012 | 544.9 | 76 |
| 2011 | 450.8 | 81 |
| 2010 | 381 | 82 |
| 2009 | 338.5 | 83 |
| 2008 | 287.8 | 89 |
| 2007 | 216.1 | 95 |
| 2006 | 163.7 | 97 |
| 2005 | 129.9 | 99 |
| 2004 | 111.2 | 99 |
| 2003 | 94.5 | 100 |
| 2002 | 95.5 | 95 |
| 2001 | 113.5 | 84 |
| 2000 | 133.4 | 80 |
| 1999 | 171.2 | 71 |
| 1998 | 150.3 | 77 |
| 1997 | 151.8 | 73 |
| 1996 | 148.5 | 74 |
| 1995 | 133.7 | 75 |
| 1994 | 133.9 | 71 |
| 1993 | 126.8 | 70 |
| 1992 | 150.3 | 63 |
| 1991 | 142.1 | 61 |
| 1990 | 158.9 | 61 |