| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 125.1 | 49 |
| 2015 | 129.5 | 59 |
| 2014 | 128.7 | 60 |
| 2013 | 122.3 | 61 |
| 2012 | 110.9 | 62 |
| 2011 | 99.8 | 63 |
| 2010 | 91.8 | 66 |
| 2009 | 88 | 65 |
| 2008 | 78.8 | 66 |
| 2007 | 70.9 | 68 |
| 2006 | 67.1 | 68 |
| 2005 | 64.7 | 68 |
| 2004 | 62.5 | 67 |
| 2003 | 59.8 | 67 |
| 2002 | 59.1 | 67 |
| 2001 | 57.7 | 67 |
| 2000 | 59.7 | 64 |
| 1999 | 57.4 | 62 |
| 1998 | 59.1 | 60 |
| 1997 | 60.5 | 60 |
| 1996 | 56.5 | 60 |
| 1995 | 59.1 | 61 |
| 1994 | 59.3 | 58 |
| 1993 | 59.4 | 58 |
| 1992 | 58.2 | 56 |
| 1991 | 57.8 | 56 |
| 1990 | 56.8 | 55 |
| 1989 | 57.2 | 45 |
| 1988 | 53 | 45 |
| 1987 | 53.2 | 46 |
| 1986 | 53.9 | 45 |