| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 147.65 | 112 |
| 2015 | 136.1 | 120 |
| 2014 | 153.09 | 121 |
| 2013 | 148.11 | 123 |
| 2012 | 142.02 | 122 |
| 2011 | 143.68 | 123 |
| 2010 | 129.37 | 120 |
| 2009 | 128.09 | 114 |
| 2008 | 134.28 | 117 |
| 2007 | 112.85 | 119 |
| 2006 | 93.59 | 120 |
| 2005 | 87.07 | 116 |
| 2004 | 80.31 | 113 |
| 2003 | 68.59 | 112 |
| 2002 | 53.34 | 117 |
| 2001 | 48.78 | 119 |
| 2000 | 46.8 | 120 |
| 1999 | 51.44 | 112 |
| 1998 | 50.3 | 111 |
| 1997 | 46.73 | 114 |
| 1996 | 50.66 | 110 |
| 1995 | 48.79 | 107 |
| 1994 | 38.77 | 107 |
| 1993 | 56.79 | 93 |
| 1992 | 60.05 | 90 |
| 1991 | 56.17 | 93 |
| 1990 | 57.17 | 92 |
| 1989 | 49.13 | 83 |
| 1988 | 49.85 | 84 |
| 1987 | 50.41 | 83 |
| 1986 | 41.9 | 81 |