| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 43.77 | 28 |
| 2015 | 43.25 | 26 |
| 2014 | 42.75 | 28 |
| 2013 | 42.23 | 25 |
| 2012 | 41.72 | 25 |
| 2011 | 41.26 | 21 |
| 2010 | 40.87 | 19 |
| 2009 | 40.56 | 16 |
| 2008 | 40.4 | 14 |
| 2007 | 40.43 | 14 |
| 2006 | 40.63 | 15 |
| 2005 | 41 | 15 |
| 2004 | 41.77 | 15 |
| 2003 | 42.76 | 15 |
| 2002 | 43.99 | 15 |
| 2001 | 45.5 | 17 |
| 2000 | 47.3 | 30 |
| 1999 | 49.28 | 43 |
| 1998 | 51.57 | 52 |
| 1997 | 54 | 60 |
| 1996 | 56.3 | 70 |
| 1995 | 58.31 | 71 |
| 1994 | 60.13 | 73 |
| 1993 | 61.48 | 73 |
| 1992 | 62.49 | 74 |
| 1991 | 63.53 | 78 |
| 1990 | 64.88 | 79 |
| 1989 | 65.52 | 78 |
| 1988 | 66.21 | 80 |
| 1987 | 66.78 | 79 |
| 1986 | 66.86 | 78 |