| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 518 | 67 |
| 2015 | 534.7 | 76 |
| 2014 | 583.8 | 75 |
| 2013 | 592.6 | 75 |
| 2012 | 529.2 | 77 |
| 2011 | 481.6 | 79 |
| 2010 | 398.9 | 81 |
| 2009 | 314.1 | 85 |
| 2008 | 318.2 | 86 |
| 2007 | 236.5 | 90 |
| 2006 | 198.5 | 91 |
| 2005 | 170.3 | 91 |
| 2004 | 133.1 | 95 |
| 2003 | 116.7 | 93 |
| 2002 | 134.4 | 83 |
| 2001 | 214.6 | 68 |
| 2000 | 235.8 | 62 |
| 1999 | 247.5 | 62 |
| 1998 | 261 | 63 |
| 1997 | 246.4 | 64 |
| 1996 | 205.5 | 66 |
| 1995 | 193.2 | 65 |
| 1994 | 175.8 | 62 |
| 1993 | 150.7 | 64 |
| 1992 | 127.7 | 66 |
| 1991 | 108.9 | 68 |
| 1990 | 87.9 | 74 |
| 1989 | 79.5 | 68 |
| 1988 | 78.6 | 65 |
| 1987 | 71.9 | 67 |
| 1986 | 55.3 | 74 |