| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 363.3 | 81 |
| 2015 | 350.4 | 91 |
| 2014 | 325.6 | 93 |
| 2013 | 285.3 | 99 |
| 2012 | 245.4 | 104 |
| 2011 | 226 | 103 |
| 2010 | 183 | 106 |
| 2009 | 168.5 | 103 |
| 2008 | 155.2 | 110 |
| 2007 | 121.3 | 115 |
| 2006 | 104.2 | 111 |
| 2005 | 92.2 | 111 |
| 2004 | 83.5 | 109 |
| 2003 | 81.4 | 105 |
| 2002 | 83.9 | 100 |
| 2001 | 85.7 | 94 |
| 2000 | 91.6 | 90 |
| 1999 | 91.5 | 90 |
| 1998 | 95.9 | 87 |
| 1997 | 85.8 | 91 |
| 1996 | 77.4 | 91 |
| 1995 | 70.3 | 91 |
| 1994 | 63.1 | 87 |
| 1993 | 62.7 | 88 |
| 1992 | 61.5 | 90 |
| 1991 | 56.4 | 92 |
| 1990 | 49.2 | 94 |
| 1989 | 47.5 | 82 |
| 1988 | 48 | 78 |
| 1987 | 45.4 | 79 |
| 1986 | 41.3 | 79 |