| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 132.31 | 118 |
| 2015 | 127.48 | 122 |
| 2014 | 118.8 | 134 |
| 2013 | 109.83 | 137 |
| 2012 | 105.32 | 135 |
| 2011 | 97.74 | 139 |
| 2010 | 87.59 | 137 |
| 2009 | 82.99 | 137 |
| 2008 | 84.97 | 134 |
| 2007 | 74.23 | 136 |
| 2006 | 67.64 | 134 |
| 2005 | 63.21 | 128 |
| 2004 | 57.96 | 127 |
| 2003 | 53.22 | 125 |
| 2002 | 52.24 | 119 |
| 2001 | 53.23 | 116 |
| 2000 | 51.07 | 116 |
| 1999 | 48.56 | 114 |
| 1998 | 46.35 | 115 |
| 1997 | 43.9 | 116 |
| 1996 | 43.08 | 116 |
| 1995 | 41.4 | 115 |
| 1994 | 38.63 | 108 |
| 1993 | 17.56 | 136 |
| 1992 | 17.93 | 134 |
| 1991 | 14.89 | 140 |
| 1990 | 10.09 | 149 |
| 1989 | 10.13 | 131 |
| 1988 | 26.31 | 104 |
| 1987 | 38.51 | 88 |
| 1986 | 28.86 | 93 |