| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 523.95 | 75 |
| 2015 | 501.99 | 80 |
| 2014 | 567.32 | 78 |
| 2013 | 557.59 | 78 |
| 2012 | 539.03 | 76 |
| 2011 | 574.18 | 76 |
| 2010 | 506.1 | 76 |
| 2009 | 517.83 | 70 |
| 2008 | 546.67 | 73 |
| 2007 | 447.66 | 73 |
| 2006 | 343.04 | 76 |
| 2005 | 298.22 | 74 |
| 2004 | 260.95 | 71 |
| 2003 | 210.75 | 75 |
| 2002 | 163.6 | 77 |
| 2001 | 141.35 | 78 |
| 2000 | 131.48 | 80 |
| 1999 | 134.95 | 79 |
| 1998 | 146.31 | 78 |
| 1997 | 111.96 | 84 |
| 1996 | 101.09 | 83 |
| 1995 | 130.63 | 77 |
| 1994 | 96.97 | 77 |
| 1993 | 108.3 | 76 |
| 1992 | 103.51 | 75 |
| 1991 | 109.44 | 74 |
| 1990 | 206.32 | 62 |
| 1989 | 219.88 | 58 |
| 1988 | 225.56 | 56 |
| 1987 | 281.01 | 49 |
| 1986 | 202.49 | 51 |