| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.48 | 8 |
| 2015 | 1.42 | 8 |
| 2014 | 1.33 | 8 |
| 2013 | 1.34 | 9 |
| 2012 | 1.36 | 10 |
| 2011 | 1.37 | 9 |
| 2010 | 1.38 | 8 |
| 2009 | 1.39 | 7 |
| 2008 | 1.39 | 9 |
| 2007 | 1.4 | 8 |
| 2006 | 1.4 | 9 |
| 2005 | 1.4 | 6 |
| 2004 | 2.41 | 14 |
| 2003 | 2.09 | 12 |
| 2002 | 1.82 | 10 |
| 2001 | 1.85 | 13 |
| 2000 | 1.88 | 12 |
| 1999 | 1.92 | 14 |
| 1998 | 1.95 | 12 |
| 1997 | 1.99 | 13 |
| 1996 | 1.95 | 16 |
| 1995 | 2.6 | 20 |
| 1994 | 2.54 | 19 |
| 1993 | 2.47 | 19 |
| 1992 | 2.41 | 18 |
| 1991 | 2.14 | 19 |