| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 105.6 | 51 |
| 2015 | 102.3 | 61 |
| 2014 | 99.9 | 62 |
| 2013 | 98 | 64 |
| 2012 | 94.6 | 64 |
| 2011 | 91.4 | 65 |
| 2010 | 90.6 | 68 |
| 2009 | 89.4 | 63 |
| 2008 | 86.3 | 65 |
| 2007 | 85.1 | 65 |
| 2006 | 82 | 65 |
| 2005 | 80.5 | 64 |
| 2004 | 78.3 | 63 |
| 2003 | 75.7 | 62 |
| 2002 | 72.7 | 62 |
| 2001 | 69.4 | 63 |
| 2000 | 64.5 | 62 |
| 1999 | 62.1 | 61 |
| 1998 | 57.9 | 61 |
| 1997 | 56.4 | 61 |
| 1996 | 54.9 | 61 |
| 1995 | 51.8 | 62 |
| 1994 | 50.2 | 59 |
| 1993 | 49.7 | 60 |
| 1992 | 47.2 | 58 |
| 1991 | 45.8 | 57 |
| 1990 | 44 | 56 |
| 1989 | 41.2 | 47 |
| 1988 | 38.1 | 47 |
| 1987 | 36.5 | 48 |
| 1986 | 33.3 | 47 |