| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 165 | 76 |
| 2015 | 177 | 83 |
| 2014 | 203 | 79 |
| 2013 | 183 | 86 |
| 2012 | 179 | 85 |
| 2011 | 163 | 84 |
| 2010 | 134 | 84 |
| 2009 | 114 | 85 |
| 2008 | 125 | 90 |
| 2007 | 102 | 90 |
| 2006 | 83 | 93 |
| 2005 | 67 | 97 |
| 2004 | 53 | 98 |
| 2003 | 45 | 97 |
| 2002 | 40 | 97 |
| 2001 | 43 | 89 |
| 2000 | 40 | 87 |
| 1999 | 35 | 90 |
| 1998 | 40 | 90 |
| 1997 | 41 | 90 |
| 1996 | 39 | 87 |
| 1995 | 35 | 88 |
| 1994 | 24 | 91 |
| 1993 | 20 | 97 |
| 1992 | 22 | 89 |
| 1991 | 23 | 84 |
| 1990 | 27 | 83 |
| 1989 | 25 | 68 |
| 1988 | 23 | 67 |
| 1987 | 21 | 71 |
| 1986 | 22 | 67 |