| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 10 | 128 |
| 2015 | 9 | 155 |
| 2014 | 9 | 158 |
| 2013 | 8 | 163 |
| 2012 | 8 | 162 |
| 2011 | 8 | 163 |
| 2010 | 8 | 164 |
| 2009 | 8 | 160 |
| 2008 | 9 | 159 |
| 2007 | 8 | 159 |
| 2006 | 8 | 158 |
| 2005 | 7 | 156 |
| 2004 | 7 | 158 |
| 2003 | 6 | 152 |
| 2002 | 6 | 150 |
| 2001 | 6 | 146 |
| 2000 | 6 | 142 |
| 1999 | 6 | 140 |
| 1998 | 5 | 145 |
| 1997 | 5 | 146 |
| 1996 | 5 | 143 |
| 1995 | 4 | 145 |
| 1994 | 4 | 125 |
| 1993 | 4 | 121 |
| 1992 | 4 | 119 |
| 1991 | 3 | 119 |
| 1990 | 3 | 117 |
| 1989 | 3 | 100 |
| 1988 | 3 | 100 |
| 1987 | 2 | 102 |
| 1986 | 2 | 98 |