| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 44.03 | 57 |
| 2015 | 43.68 | 59 |
| 2014 | 43.05 | 60 |
| 2013 | 43.44 | 59 |
| 2012 | 45.76 | 51 |
| 2011 | 46.26 | 48 |
| 2010 | 45.65 | 51 |
| 2009 | 45.92 | 51 |
| 2008 | 46.56 | 55 |
| 2007 | 47.18 | 52 |
| 2006 | 46.4 | 54 |
| 2005 | 49.02 | 48 |
| 2004 | 49.45 | 45 |
| 2003 | 48.36 | 47 |
| 2002 | 49.45 | 44 |
| 2001 | 49.53 | 46 |
| 2000 | 49.34 | 48 |
| 1999 | 48.86 | 49 |
| 1998 | 52.31 | 39 |
| 1997 | 57.85 | 24 |
| 1996 | 59.14 | 21 |
| 1995 | 60.65 | 22 |
| 1994 | 62.06 | 20 |
| 1993 | 64.77 | 19 |
| 1992 | 68.43 | 14 |
| 1991 | 69.27 | 13 |