| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 318 | 57 |
| 2015 | 326 | 59 |
| 2014 | 304 | 65 |
| 2013 | 269 | 68 |
| 2012 | 342 | 60 |
| 2011 | 299 | 64 |
| 2010 | 232 | 65 |
| 2009 | 249 | 61 |
| 2008 | 279 | 65 |
| 2007 | 234 | 63 |
| 2006 | 164 | 65 |
| 2005 | 101 | 73 |
| 2004 | 60 | 83 |
| 2003 | 49 | 82 |
| 2002 | 41 | 84 |
| 2001 | 38 | 84 |
| 2000 | 33 | 89 |
| 1999 | 25 | 97 |
| 1998 | 34 | 83 |
| 1997 | 33 | 85 |
| 1996 | 29 | 87 |
| 1995 | 34 | 77 |
| 1994 | 19 | 92 |
| 1993 | 19 | 82 |
| 1992 | 20 | 80 |
| 1991 | 17 | 81 |
| 1990 | 17 | 79 |
| 1989 | 13 | 86 |
| 1988 | 13 | 85 |
| 1987 | 12 | 85 |
| 1986 | 11 | 84 |