| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.86 | 82 |
| 2015 | 51.09 | 77 |
| 2014 | 50.4 | 73 |
| 2013 | 49.77 | 70 |
| 2012 | 49.19 | 68 |
| 2011 | 48.64 | 67 |
| 2010 | 48.07 | 62 |
| 2009 | 47.88 | 58 |
| 2008 | 47.83 | 57 |
| 2007 | 47.96 | 53 |
| 2006 | 48.22 | 51 |
| 2005 | 48.57 | 49 |
| 2004 | 48.72 | 48 |
| 2003 | 48.93 | 47 |
| 2002 | 49.16 | 48 |
| 2001 | 49.43 | 48 |
| 2000 | 49.73 | 51 |
| 1999 | 49.83 | 49 |
| 1998 | 50 | 46 |
| 1997 | 50.18 | 42 |
| 1996 | 50.28 | 41 |
| 1995 | 50.24 | 38 |
| 1994 | 50.22 | 36 |
| 1993 | 50.03 | 32 |
| 1992 | 49.76 | 27 |
| 1991 | 49.58 | 27 |
| 1990 | 49.59 | 25 |
| 1989 | 49.74 | 27 |
| 1988 | 50.11 | 31 |
| 1987 | 50.6 | 31 |
| 1986 | 51.01 | 34 |