| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.848 | 48 |
| 2015 | 4.051 | 57 |
| 2014 | 4.161 | 58 |
| 2013 | 3.872 | 69 |
| 2012 | 3.5 | 83 |
| 2011 | 3.033 | 99 |
| 2010 | 3.542 | 85 |
| 2009 | 4.108 | 87 |
| 2008 | 3.996 | 103 |
| 2007 | 3.769 | 114 |
| 2006 | 3.444 | 111 |
| 2005 | 3.433 | 100 |
| 2004 | 3.84 | 83 |
| 2003 | 5.287 | 65 |
| 2002 | 6.246 | 62 |
| 2001 | 5.943 | 74 |
| 2000 | 6.181 | 85 |
| 1999 | 6.252 | 87 |
| 1998 | 6.219 | 97 |
| 1997 | 6.425 | 90 |
| 1995 | 6.367 | 91 |
| 1994 | 6.342 | 86 |
| 1989 | 6.767 | 77 |
| 1988 | 5.433 | 87 |
| 1987 | 5.883 | 76 |
| 1986 | 7.25 | 65 |