| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.07 | 42 |
| 2015 | 4.12 | 40 |
| 2014 | 4.24 | 43 |
| 2013 | 4.26 | 45 |
| 2012 | 4.47 | 49 |
| 2011 | 4.5 | 48 |
| 2010 | 4.53 | 43 |
| 2009 | 5 | 44 |
| 2008 | 3.05 | 29 |
| 2007 | 3.96 | 44 |
| 2006 | 4.46 | 47 |
| 2005 | 4.25 | 36 |
| 2004 | 4.45 | 43 |
| 2003 | 4.32 | 40 |
| 2002 | 3.36 | 30 |
| 2001 | 3.31 | 26 |
| 2000 | 3.27 | 29 |
| 1999 | 4.6 | 41 |
| 1998 | 2.73 | 19 |
| 1997 | 5.06 | 49 |
| 1996 | 2.51 | 20 |
| 1995 | 3.6 | 35 |
| 1994 | 2.88 | 25 |
| 1993 | 2.37 | 17 |
| 1992 | 3.79 | 41 |
| 1991 | 2.2 | 20 |