| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.36 | 62 |
| 2015 | 5.28 | 60 |
| 2014 | 5.3 | 62 |
| 2013 | 5.33 | 62 |
| 2012 | 5.36 | 60 |
| 2011 | 5.39 | 60 |
| 2010 | 5.42 | 54 |
| 2009 | 5.46 | 56 |
| 2008 | 5.51 | 66 |
| 2007 | 5.56 | 67 |
| 2006 | 5.59 | 61 |
| 2005 | 5.63 | 62 |
| 2004 | 5.66 | 59 |
| 2003 | 5.68 | 56 |
| 2002 | 5.71 | 59 |
| 2001 | 5.72 | 62 |
| 2000 | 5.72 | 62 |
| 1999 | 5.74 | 55 |
| 1998 | 5.74 | 61 |
| 1997 | 5.73 | 61 |
| 1996 | 5.73 | 57 |
| 1995 | 5.73 | 63 |
| 1994 | 5.74 | 63 |
| 1993 | 5.77 | 65 |
| 1992 | 5.78 | 67 |
| 1991 | 5.79 | 66 |