| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 99.91 | 130 |
| 2015 | 97.39 | 135 |
| 2014 | 106.74 | 138 |
| 2013 | 106.02 | 139 |
| 2012 | 99.2 | 138 |
| 2011 | 98.93 | 138 |
| 2010 | 87.3 | 139 |
| 2009 | 85.5 | 133 |
| 2008 | 94.13 | 132 |
| 2007 | 73.43 | 137 |
| 2006 | 55.16 | 139 |
| 2005 | 50.39 | 137 |
| 2004 | 43.64 | 139 |
| 2003 | 54.74 | 123 |
| 2002 | 43.97 | 125 |
| 2001 | 45.3 | 122 |
| 2000 | 38.78 | 126 |
| 1999 | 37.18 | 126 |
| 1998 | 37.39 | 126 |
| 1997 | 35.46 | 128 |
| 1996 | 39.95 | 118 |
| 1995 | 31.6 | 127 |
| 1994 | 29.77 | 120 |
| 1993 | 33.71 | 110 |
| 1992 | 30.24 | 116 |
| 1991 | 26.53 | 125 |
| 1990 | 30.81 | 115 |
| 1989 | 24.98 | 108 |
| 1988 | 24.43 | 107 |
| 1987 | 25.66 | 99 |
| 1986 | 32.58 | 89 |