| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.14 | 67 |
| 2015 | 49.19 | 64 |
| 2014 | 48.48 | 60 |
| 2013 | 47.8 | 58 |
| 2012 | 47.21 | 55 |
| 2011 | 46.81 | 52 |
| 2010 | 46.7 | 50 |
| 2009 | 46.95 | 51 |
| 2008 | 47.51 | 53 |
| 2007 | 48.29 | 57 |
| 2006 | 49.09 | 57 |
| 2005 | 49.74 | 61 |
| 2004 | 50.41 | 64 |
| 2003 | 50.96 | 61 |
| 2002 | 51.34 | 60 |
| 2001 | 51.54 | 58 |
| 2000 | 51.59 | 56 |
| 1999 | 51.3 | 54 |
| 1998 | 50.95 | 50 |
| 1997 | 50.62 | 47 |
| 1996 | 50.42 | 43 |
| 1995 | 50.39 | 39 |
| 1994 | 50.43 | 37 |
| 1993 | 50.46 | 36 |
| 1992 | 50.44 | 30 |
| 1991 | 50.32 | 32 |
| 1990 | 50.06 | 30 |