| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 121.15 | 120 |
| 2015 | 111.49 | 130 |
| 2014 | 124.01 | 132 |
| 2013 | 119.35 | 135 |
| 2012 | 111.66 | 133 |
| 2011 | 107.24 | 133 |
| 2010 | 89.8 | 135 |
| 2009 | 83.69 | 135 |
| 2008 | 83.7 | 136 |
| 2007 | 67.71 | 138 |
| 2006 | 58.45 | 137 |
| 2005 | 54.63 | 136 |
| 2004 | 48.39 | 133 |
| 2003 | 42.06 | 132 |
| 2002 | 32.06 | 139 |
| 2001 | 28.13 | 138 |
| 2000 | 26.29 | 142 |
| 1999 | 29.94 | 137 |
| 1998 | 28.05 | 138 |
| 1997 | 24.48 | 139 |
| 1996 | 25.87 | 137 |
| 1995 | 23.8 | 137 |
| 1994 | 18.95 | 132 |
| 1993 | 23.32 | 126 |
| 1992 | 22.4 | 128 |
| 1991 | 31.35 | 115 |
| 1990 | 31.01 | 114 |
| 1989 | 26.16 | 106 |
| 1988 | 26.16 | 105 |
| 1987 | 23.7 | 101 |
| 1986 | 20.36 | 101 |