| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 104.1 | 114 |
| 2015 | 104.1 | 133 |
| 2014 | 106.1 | 138 |
| 2013 | 135.4 | 129 |
| 2012 | 124.4 | 131 |
| 2011 | 112.1 | 134 |
| 2010 | 83 | 137 |
| 2009 | 67.6 | 142 |
| 2008 | 71 | 140 |
| 2007 | 73.5 | 135 |
| 2006 | 61.4 | 135 |
| 2005 | 54.4 | 135 |
| 2004 | 49.6 | 133 |
| 2003 | 43.7 | 132 |
| 2002 | 43.5 | 125 |
| 2001 | 39 | 124 |
| 2000 | 41.1 | 122 |
| 1999 | 42.6 | 117 |
| 1998 | 43.3 | 118 |
| 1997 | 52.7 | 108 |
| 1996 | 51.5 | 106 |
| 1995 | 45.5 | 110 |
| 1994 | 39.8 | 104 |
| 1993 | 39.8 | 102 |
| 1992 | 37.7 | 101 |
| 1991 | 27.2 | 119 |
| 1990 | 26.6 | 118 |
| 1989 | 21.9 | 105 |