| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1435.5 | 48 |
| 2015 | 1316.2 | 55 |
| 2014 | 1300 | 56 |
| 2013 | 1131.7 | 59 |
| 2012 | 986.5 | 59 |
| 2011 | 897.3 | 60 |
| 2010 | 768.6 | 60 |
| 2009 | 761.6 | 61 |
| 2008 | 768.9 | 61 |
| 2007 | 602.3 | 63 |
| 2006 | 444 | 65 |
| 2005 | 287.6 | 75 |
| 2004 | 196.9 | 80 |
| 2003 | 157.1 | 82 |
| 2002 | 131.3 | 84 |
| 2001 | 110.8 | 86 |
| 2000 | 97.8 | 88 |
| 1999 | 81.4 | 93 |
| 1998 | 91.1 | 90 |
| 1997 | 99.3 | 84 |
| 1996 | 87 | 88 |
| 1995 | 80.6 | 89 |
| 1994 | 65.6 | 86 |