| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 53.46 | 72 |
| 2015 | 54.46 | 71 |
| 2014 | 55.51 | 70 |
| 2013 | 56.58 | 67 |
| 2012 | 57.7 | 63 |
| 2011 | 58.84 | 64 |
| 2010 | 60.02 | 61 |
| 2009 | 61.22 | 58 |
| 2008 | 62.45 | 55 |
| 2007 | 63.7 | 54 |
| 2006 | 64.97 | 49 |
| 2005 | 66.25 | 48 |
| 2004 | 67.51 | 46 |
| 2003 | 68.75 | 44 |
| 2002 | 69.96 | 42 |
| 2001 | 71.14 | 40 |
| 2000 | 72.29 | 37 |
| 1999 | 72.87 | 36 |
| 1998 | 73.25 | 35 |
| 1997 | 73.62 | 35 |
| 1996 | 73.99 | 35 |
| 1995 | 74.36 | 35 |
| 1994 | 74.41 | 36 |
| 1993 | 74.35 | 36 |
| 1992 | 74.29 | 36 |
| 1991 | 74.22 | 37 |
| 1990 | 74.16 | 39 |
| 1989 | 74.19 | 39 |
| 1988 | 74.27 | 39 |
| 1987 | 74.35 | 42 |
| 1986 | 74.43 | 42 |