| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 44.82 | 35 |
| 2015 | 45.23 | 40 |
| 2014 | 45.93 | 45 |
| 2013 | 46.82 | 52 |
| 2012 | 47.84 | 58 |
| 2011 | 48.88 | 68 |
| 2010 | 49.85 | 77 |
| 2009 | 50.91 | 81 |
| 2008 | 51.85 | 87 |
| 2007 | 52.69 | 91 |
| 2006 | 53.47 | 92 |
| 2005 | 54.25 | 91 |
| 2004 | 54.25 | 86 |
| 2003 | 54.55 | 83 |
| 2002 | 55.17 | 81 |
| 2001 | 55.9 | 79 |
| 2000 | 56.48 | 78 |
| 1999 | 56.99 | 77 |
| 1998 | 57.55 | 75 |
| 1997 | 58.42 | 75 |
| 1996 | 59.73 | 75 |
| 1995 | 61.45 | 79 |
| 1994 | 62.12 | 77 |
| 1993 | 62.42 | 75 |
| 1992 | 62.42 | 73 |
| 1991 | 62.54 | 76 |
| 1990 | 63.22 | 77 |
| 1989 | 60.56 | 70 |
| 1988 | 59.1 | 63 |
| 1987 | 58.79 | 62 |
| 1986 | 59.09 | 63 |