| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.28 | 7 |
| 2015 | 1.23 | 7 |
| 2014 | 1.19 | 7 |
| 2013 | 1.2 | 7 |
| 2012 | 1.2 | 7 |
| 2011 | 1.23 | 8 |
| 2010 | 1.13 | 7 |
| 2009 | 1.3 | 6 |
| 2008 | 1.34 | 8 |
| 2007 | 1.36 | 7 |
| 2006 | 1.37 | 7 |
| 2005 | 1.35 | 4 |
| 2004 | 1.38 | 4 |
| 2003 | 1.39 | 6 |
| 2002 | 1.39 | 7 |
| 2001 | 1.44 | 8 |
| 2000 | 1.42 | 7 |
| 1999 | 1.43 | 9 |
| 1998 | 1.42 | 9 |
| 1997 | 1.41 | 8 |
| 1996 | 1.34 | 11 |
| 1995 | 1.33 | 10 |
| 1994 | 1.34 | 8 |
| 1993 | 1.35 | 8 |
| 1992 | 1.36 | 7 |
| 1991 | 1.36 | 10 |