| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 20 | 118 |
| 2015 | 25 | 140 |
| 2014 | 25 | 143 |
| 2013 | 25 | 146 |
| 2012 | 19 | 149 |
| 2011 | 15 | 154 |
| 2010 | 14 | 155 |
| 2009 | 14 | 152 |
| 2008 | 14 | 153 |
| 2007 | 13 | 151 |
| 2006 | 10 | 154 |
| 2005 | 11 | 145 |
| 2004 | 14 | 135 |
| 2003 | 14 | 132 |
| 2002 | 12 | 132 |
| 2001 | 11 | 128 |
| 2000 | 12 | 126 |
| 1999 | 16 | 119 |
| 1998 | 16 | 121 |
| 1997 | 18 | 116 |
| 1996 | 19 | 109 |
| 1995 | 18 | 107 |
| 1994 | 17 | 87 |
| 1993 | 17 | 87 |
| 1992 | 18 | 84 |
| 1991 | 14 | 89 |
| 1990 | 12 | 95 |
| 1989 | 10 | 84 |
| 1988 | 10 | 82 |
| 1987 | 9 | 80 |
| 1986 | 8 | 80 |