| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 233.2 | 46 |
| 2015 | 222.3 | 54 |
| 2014 | 210.2 | 56 |
| 2013 | 194.2 | 58 |
| 2012 | 180.5 | 58 |
| 2011 | 166.8 | 59 |
| 2010 | 155.3 | 60 |
| 2009 | 149.5 | 58 |
| 2008 | 133.4 | 57 |
| 2007 | 127.2 | 57 |
| 2006 | 122 | 57 |
| 2005 | 113.3 | 56 |
| 2004 | 103.9 | 58 |
| 2003 | 99.8 | 58 |
| 2002 | 96.1 | 57 |
| 2001 | 96.1 | 56 |
| 2000 | 96.8 | 55 |
| 1999 | 93.9 | 54 |
| 1998 | 90.7 | 55 |
| 1997 | 88.5 | 54 |
| 1996 | 82.3 | 56 |
| 1995 | 78.8 | 56 |
| 1994 | 72.6 | 55 |
| 1993 | 66.8 | 56 |
| 1992 | 64.8 | 55 |
| 1991 | 63.1 | 54 |
| 1990 | 61.8 | 52 |
| 1989 | 68.8 | 44 |
| 1988 | 85.1 | 41 |
| 1987 | 101 | 39 |
| 1986 | 95.5 | 38 |