| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2013 | 104.2 | 63 |
| 2012 | 102.6 | 63 |
| 2011 | 103.3 | 62 |
| 2010 | 108.4 | 63 |
| 2009 | 112.2 | 60 |
| 2008 | 109.4 | 60 |
| 2007 | 114.8 | 59 |
| 2006 | 115.8 | 58 |
| 2005 | 116.3 | 55 |
| 2004 | 111.7 | 54 |
| 2003 | 111.1 | 54 |
| 2002 | 110.8 | 54 |
| 2001 | 103.7 | 54 |
| 2000 | 99.8 | 53 |
| 1999 | 105.7 | 52 |
| 1998 | 101.3 | 52 |
| 1997 | 99.4 | 52 |
| 1996 | 94.5 | 53 |
| 1995 | 90 | 53 |
| 1994 | 84.1 | 52 |
| 1993 | 83.9 | 53 |
| 1992 | 83 | 51 |
| 1991 | 82.9 | 52 |
| 1990 | 83.3 | 51 |
| 1989 | 80.8 | 43 |
| 1988 | 74.3 | 44 |
| 1987 | 69.3 | 44 |
| 1986 | 65.3 | 42 |