| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 5 | 173 |
| 2015 | 4 | 180 |
| 2014 | 5 | 180 |
| 2013 | 5 | 181 |
| 2012 | 5 | 180 |
| 2011 | 4 | 180 |
| 2010 | 5 | 174 |
| 2009 | 5 | 170 |
| 2008 | 7 | 169 |
| 2007 | 7 | 167 |
| 2006 | 6 | 166 |
| 2005 | 5 | 165 |
| 2004 | 5 | 168 |
| 2003 | 4 | 165 |
| 2002 | 4 | 164 |
| 2001 | 4 | 165 |
| 2000 | 4 | 162 |
| 1999 | 4 | 161 |
| 1998 | 4 | 161 |
| 1997 | 4 | 160 |
| 1996 | 4 | 162 |
| 1995 | 3 | 161 |
| 1994 | 3 | 154 |
| 1993 | 3 | 145 |
| 1992 | 3 | 144 |
| 1991 | 3 | 137 |
| 1990 | 3 | 140 |
| 1989 | 2 | 141 |
| 1988 | 3 | 134 |
| 1987 | 2 | 136 |
| 1986 | 2 | 138 |