| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 60.9 | 126 |
| 2015 | 67.9 | 146 |
| 2014 | 64.1 | 147 |
| 2013 | 59 | 150 |
| 2012 | 69.6 | 148 |
| 2011 | 85.8 | 144 |
| 2010 | 78 | 141 |
| 2009 | 69.1 | 140 |
| 2008 | 62.1 | 145 |
| 2007 | 48.7 | 144 |
| 2006 | 47.6 | 141 |
| 2005 | 44.3 | 139 |
| 2004 | 39.5 | 139 |
| 2003 | 35.5 | 137 |
| 2002 | 38.5 | 131 |
| 2001 | 19.1 | 142 |
| 2000 | 19.1 | 142 |
| 1999 | 20.5 | 138 |
| 1998 | 18.4 | 143 |
| 1997 | 29.9 | 131 |
| 1996 | 24.9 | 133 |
| 1995 | 16.5 | 143 |
| 1994 | 15.6 | 136 |
| 1993 | 24 | 122 |
| 1992 | 21.5 | 125 |
| 1991 | 23.4 | 125 |
| 1990 | 20.6 | 124 |
| 1989 | 18.4 | 108 |
| 1988 | 15.1 | 107 |
| 1987 | 12.1 | 111 |
| 1986 | 12.1 | 111 |