| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 109 | 126 |
| 2015 | 100.52 | 134 |
| 2014 | 113.62 | 136 |
| 2013 | 108.18 | 138 |
| 2012 | 97.45 | 139 |
| 2011 | 104.95 | 134 |
| 2010 | 94.07 | 133 |
| 2009 | 94.02 | 128 |
| 2008 | 99.1 | 130 |
| 2007 | 83.36 | 131 |
| 2006 | 68.61 | 133 |
| 2005 | 62.59 | 132 |
| 2004 | 56.83 | 128 |
| 2003 | 49.46 | 126 |
| 2002 | 40.18 | 129 |
| 2001 | 37.1 | 128 |
| 2000 | 37.73 | 127 |
| 1999 | 36.73 | 127 |
| 1998 | 35.71 | 130 |
| 1997 | 37.35 | 124 |
| 1996 | 44.22 | 114 |
| 1995 | 44.49 | 111 |
| 1994 | 33.81 | 115 |
| 1993 | 25.5 | 123 |
| 1992 | 23.17 | 124 |
| 1991 | 46.95 | 99 |
| 1990 | 44.72 | 100 |