| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 313 | 27 |
| 2015 | 290 | 33 |
| 2014 | 255 | 35 |
| 2013 | 233 | 36 |
| 2012 | 204 | 40 |
| 2011 | 189 | 41 |
| 2010 | 178 | 38 |
| 2009 | 141 | 42 |
| 2008 | 131 | 46 |
| 2007 | 135 | 41 |
| 2006 | 111 | 44 |
| 2005 | 86 | 47 |
| 2004 | 67 | 44 |
| 2003 | 57 | 44 |
| 2002 | 56 | 39 |
| 2001 | 49 | 39 |
| 2000 | 56 | 35 |
| 1999 | 52 | 36 |
| 1998 | 75 | 30 |
| 1997 | 151 | 21 |
| 1996 | 129 | 22 |
| 1995 | 93 | 24 |
| 1994 | 67 | 25 |
| 1993 | 46 | 27 |
| 1992 | 46 | 27 |
| 1991 | 33 | 28 |
| 1990 | 29 | 31 |
| 1989 | 27 | 30 |
| 1988 | 20 | 30 |
| 1987 | 19 | 30 |
| 1986 | 21 | 26 |