| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 7 | 170 |
| 2015 | 7 | 175 |
| 2014 | 9 | 173 |
| 2013 | 10 | 169 |
| 2012 | 9 | 171 |
| 2011 | 9 | 170 |
| 2010 | 8 | 165 |
| 2009 | 7 | 165 |
| 2008 | 9 | 165 |
| 2007 | 8 | 165 |
| 2006 | 7 | 165 |
| 2005 | 6 | 163 |
| 2004 | 5 | 164 |
| 2003 | 5 | 163 |
| 2002 | 4 | 166 |
| 2001 | 3 | 167 |
| 2000 | 4 | 165 |
| 1999 | 4 | 163 |
| 1998 | 4 | 158 |
| 1997 | 4 | 158 |
| 1996 | 5 | 156 |
| 1995 | 4 | 153 |
| 1994 | 4 | 151 |
| 1993 | 3 | 143 |
| 1992 | 5 | 130 |
| 1991 | 4 | 128 |
| 1990 | 4 | 126 |
| 1989 | 4 | 125 |
| 1988 | 5 | 117 |
| 1987 | 5 | 115 |
| 1986 | 4 | 120 |