| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 49.07 | 42 |
| 2015 | 49.5 | 42 |
| 2014 | 50.31 | 38 |
| 2013 | 50.13 | 38 |
| 2012 | 54.7 | 27 |
| 2011 | 54.41 | 28 |
| 2010 | 55.69 | 25 |
| 2009 | 55.81 | 25 |
| 2008 | 53.86 | 35 |
| 2007 | 52.91 | 36 |
| 2006 | 46.57 | 53 |
| 2005 | 42.88 | 66 |
| 2004 | 44.19 | 61 |
| 2003 | 42.84 | 63 |
| 2002 | 49.33 | 46 |
| 2001 | 52.07 | 41 |
| 2000 | 49.48 | 47 |
| 1999 | 53.52 | 37 |
| 1998 | 51.01 | 44 |
| 1997 | 49.73 | 48 |
| 1996 | 48.65 | 52 |
| 1995 | 48.81 | 49 |
| 1994 | 45.68 | 69 |
| 1993 | 44.55 | 73 |
| 1992 | 39.91 | 111 |
| 1991 | 42.37 | 98 |