| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 133.97 | 117 |
| 2015 | 126.73 | 124 |
| 2014 | 127.16 | 131 |
| 2013 | 124.76 | 132 |
| 2012 | 112.79 | 132 |
| 2011 | 104.65 | 135 |
| 2010 | 89.13 | 136 |
| 2009 | 72.68 | 140 |
| 2008 | 66.74 | 141 |
| 2007 | 55.06 | 145 |
| 2006 | 49.1 | 143 |
| 2005 | 48.32 | 141 |
| 2004 | 43.29 | 140 |
| 2003 | 39.68 | 135 |
| 2002 | 35.56 | 132 |
| 2001 | 40.04 | 126 |
| 2000 | 43.14 | 122 |
| 1999 | 42.71 | 121 |
| 1998 | 40.68 | 120 |
| 1997 | 37.6 | 123 |
| 1996 | 34.1 | 128 |
| 1995 | 32.83 | 126 |
| 1994 | 28.43 | 121 |