| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 2532 | 75 |
| 2015 | 2622 | 94 |
| 2014 | 2513 | 95 |
| 2013 | 2702 | 96 |
| 2012 | 2742 | 98 |
| 2011 | 2748 | 96 |
| 2010 | 2804 | 103 |
| 2009 | 3063 | 85 |
| 2008 | 3134 | 82 |
| 2007 | 3031 | 82 |
| 2006 | 2884 | 80 |
| 2005 | 2839 | 77 |
| 2004 | 2559 | 79 |
| 2003 | 2373 | 81 |
| 2002 | 2400 | 79 |
| 2001 | 2469 | 72 |
| 2000 | 2389 | 69 |
| 1999 | 2128 | 70 |
| 1998 | 2112 | 71 |
| 1997 | 2012 | 72 |
| 1996 | 1951 | 74 |
| 1995 | 1859 | 75 |
| 1994 | 1935 | 71 |
| 1993 | 1991 | 62 |
| 1992 | 2126 | 58 |
| 1991 | 1755 | 66 |
| 1990 | 2137 | 57 |
| 1989 | 2469 | 50 |
| 1988 | 2694 | 42 |
| 1987 | 2930 | 42 |
| 1986 | 2874 | 40 |