| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 16 | 131 |
| 2015 | 26 | 123 |
| 2014 | 38 | 120 |
| 2013 | 38 | 120 |
| 2012 | 48 | 111 |
| 2011 | 48 | 114 |
| 2010 | 36 | 115 |
| 2009 | 28 | 116 |
| 2008 | 42 | 113 |
| 2007 | 37 | 112 |
| 2006 | 34 | 110 |
| 2005 | 31 | 105 |
| 2004 | 22 | 111 |
| 2003 | 6 | 138 |
| 2002 | 2 | 159 |
| 2001 | 2 | 160 |
| 2000 | 2 | 162 |
| 1999 | 2 | 157 |
| 1998 | 3 | 151 |
| 1997 | 2 | 151 |
| 1996 | 2 | 151 |
| 1995 | 2 | 149 |
| 1994 | 1 | 155 |
| 1993 | 1 | 141 |
| 1992 | 2 | 134 |
| 1991 | 2 | 129 |
| 1990 | 2 | 129 |
| 1989 | 2 | 129 |
| 1988 | 1 | 130 |
| 1987 | 1 | 134 |
| 1986 | 1 | 134 |