| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 108.3 | 25 |
| 2015 | 41 | 48 |
| 2014 | 92.7 | 31 |
| 2013 | 127.7 | 25 |
| 2012 | 95 | 32 |
| 2011 | 97.7 | 35 |
| 2010 | 95 | 33 |
| 2009 | 90.2 | 28 |
| 2008 | 111.9 | 31 |
| 2007 | 88.3 | 42 |
| 2006 | 91.6 | 35 |
| 2005 | 136.4 | 21 |
| 2004 | 132.9 | 17 |
| 2003 | 70.1 | 22 |
| 2002 | 54.8 | 22 |
| 2001 | 65.2 | 20 |
| 2000 | 115.1 | 20 |
| 1999 | 93.3 | 19 |
| 1998 | 54.1 | 22 |
| 1997 | 28.4 | 32 |
| 1996 | 23.3 | 32 |
| 1995 | 17.8 | 32 |
| 1994 | 8.1 | 41 |
| 1993 | 5.9 | 42 |
| 1992 | 7.3 | 32 |
| 1991 | 11.8 | 26 |
| 1990 | 7.9 | 28 |
| 1989 | 11.2 | 24 |
| 1988 | 10.1 | 19 |
| 1987 | 6.2 | 21 |
| 1986 | 4.6 | 22 |