| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 126.1 | 3 |
| 2015 | 149.8 | 4 |
| 2014 | 105.8 | 7 |
| 2013 | 107.7 | 6 |
| 2012 | 134.4 | 5 |
| 2011 | 194.2 | 5 |
| 2010 | 149.3 | 4 |
| 2009 | 201.9 | 3 |
| 2008 | 252.2 | 4 |
| 2007 | 170.8 | 3 |
| 2006 | 160.5 | 2 |
| 2005 | 167.1 | 2 |
| 2004 | 122.8 | 3 |
| 2003 | 138.8 | 2 |
| 2002 | 231.7 | 1 |
| 2001 | 159.9 | 3 |
| 2000 | 289.2 | 3 |
| 1999 | 249.8 | 2 |
| 1998 | 139.9 | 6 |
| 1997 | 407.9 | 1 |
| 1996 | 127.6 | 2 |
| 1995 | 101.2 | 2 |
| 1994 | 149.6 | 2 |
| 1993 | 150.8 | 1 |
| 1992 | 107 | 3 |
| 1991 | 85.6 | 2 |
| 1990 | 67.6 | 5 |
| 1989 | 85 | 4 |
| 1988 | 90 | 4 |
| 1987 | 78.3 | 7 |
| 1986 | 80 | 3 |