| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 16 | 122 |
| 2015 | 15 | 146 |
| 2014 | 15 | 149 |
| 2013 | 14 | 154 |
| 2012 | 13 | 156 |
| 2011 | 12 | 157 |
| 2010 | 11 | 158 |
| 2009 | 10 | 158 |
| 2008 | 9 | 158 |
| 2007 | 8 | 160 |
| 2006 | 7 | 159 |
| 2005 | 3 | 169 |
| 2004 | 3 | 171 |
| 2003 | 3 | 170 |
| 2002 | 3 | 169 |
| 2001 | 2 | 169 |
| 2000 | 2 | 166 |
| 1999 | 2 | 163 |
| 1998 | 2 | 163 |
| 1997 | 2 | 163 |
| 1996 | 2 | 162 |
| 1995 | 1 | 164 |
| 1994 | 1 | 146 |
| 1993 | 1 | 142 |
| 1992 | 1 | 138 |
| 1991 | 1 | 138 |
| 1990 | 1 | 131 |
| 1989 | 1 | 116 |
| 1988 | 2 | 108 |
| 1987 | 1 | 109 |
| 1986 | 2 | 99 |