| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 90.8 | 123 |
| 2015 | 103.8 | 134 |
| 2014 | 154.7 | 118 |
| 2013 | 157.1 | 118 |
| 2012 | 163.1 | 117 |
| 2011 | 136.9 | 122 |
| 2010 | 119.2 | 120 |
| 2009 | 110.5 | 122 |
| 2008 | 99.2 | 128 |
| 2007 | 74.3 | 134 |
| 2006 | 54.3 | 138 |
| 2005 | 46.2 | 138 |
| 2004 | 55 | 131 |
| 2003 | 42.1 | 134 |
| 2002 | 19.3 | 147 |
| 2001 | 29.6 | 133 |
| 2000 | 19.9 | 138 |
| 1999 | 16.4 | 145 |
| 1998 | 14.8 | 148 |
| 1997 | 11.8 | 150 |
| 1996 | 10.3 | 155 |
| 1995 | 4.5 | 165 |
| 1994 | 1.6 | 170 |
| 1993 | 2.5 | 161 |
| 1992 | 2.6 | 158 |
| 1991 | 2.9 | 154 |
| 1990 | 2.5 | 153 |
| 1989 | 2.1 | 135 |
| 1988 | 2.6 | 127 |
| 1987 | 2.3 | 129 |
| 1986 | 1.6 | 132 |