| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 255.8 | 91 |
| 2015 | 314.2 | 93 |
| 2014 | 350.7 | 91 |
| 2013 | 320.1 | 93 |
| 2012 | 285.4 | 94 |
| 2011 | 287.4 | 94 |
| 2010 | 249.6 | 94 |
| 2009 | 245.5 | 94 |
| 2008 | 242.7 | 97 |
| 2007 | 205.7 | 96 |
| 2006 | 175.8 | 95 |
| 2005 | 167.6 | 92 |
| 2004 | 158.4 | 88 |
| 2003 | 135.8 | 86 |
| 2002 | 109.6 | 90 |
| 2001 | 97.6 | 91 |
| 2000 | 89.5 | 91 |
| 1999 | 100.3 | 87 |
| 1998 | 92.7 | 89 |
| 1997 | 95.4 | 88 |
| 1996 | 92.5 | 85 |
| 1995 | 82.3 | 87 |
| 1994 | 88.3 | 79 |
| 1993 | 134.5 | 69 |
| 1992 | 111.4 | 70 |
| 1991 | 117.7 | 67 |
| 1990 | 108.3 | 68 |
| 1989 | 108.1 | 58 |
| 1988 | 124.8 | 57 |
| 1987 | 127.9 | 58 |
| 1986 | 105.6 | 58 |