| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 215.2 | 94 |
| 2015 | 229.8 | 104 |
| 2014 | 233.6 | 105 |
| 2013 | 207.7 | 109 |
| 2012 | 250.8 | 102 |
| 2011 | 206.1 | 109 |
| 2010 | 169.3 | 108 |
| 2009 | 165.5 | 104 |
| 2008 | 202.9 | 101 |
| 2007 | 154 | 105 |
| 2006 | 102.6 | 113 |
| 2005 | 117 | 104 |
| 2004 | 113 | 98 |
| 2003 | 97.1 | 98 |
| 2002 | 85.1 | 99 |
| 2001 | 78.8 | 98 |
| 2000 | 70.2 | 98 |
| 1999 | 64.2 | 102 |
| 1998 | 63.7 | 101 |
| 1997 | 59.7 | 100 |
| 1996 | 51.3 | 107 |
| 1995 | 46.4 | 108 |
| 1994 | 43.2 | 101 |
| 1993 | 42.4 | 99 |
| 1992 | 48.5 | 95 |
| 1991 | 48.7 | 95 |
| 1990 | 42.1 | 98 |
| 1989 | 39.8 | 86 |
| 1988 | 42.7 | 82 |
| 1987 | 47.3 | 78 |
| 1986 | 49.7 | 76 |