| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 170 | 75 |
| 2015 | 176 | 77 |
| 2014 | 183 | 80 |
| 2013 | 175 | 82 |
| 2012 | 170 | 83 |
| 2011 | 166 | 80 |
| 2010 | 138 | 79 |
| 2009 | 115 | 79 |
| 2008 | 145 | 83 |
| 2007 | 136 | 78 |
| 2006 | 119 | 73 |
| 2005 | 105 | 69 |
| 2004 | 95 | 70 |
| 2003 | 81 | 68 |
| 2002 | 77 | 66 |
| 2001 | 56 | 73 |
| 2000 | 48 | 76 |
| 1999 | 44 | 72 |
| 1998 | 47 | 73 |
| 1997 | 39 | 80 |
| 1996 | 31 | 83 |
| 1995 | 33 | 79 |
| 1994 | 28 | 77 |
| 1993 | 26 | 71 |
| 1992 | 25 | 71 |
| 1991 | 19 | 77 |
| 1990 | 16 | 81 |
| 1989 | 17 | 75 |
| 1988 | 16 | 75 |
| 1987 | 14 | 75 |
| 1986 | 10 | 91 |