| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.06 | 2 |
| 2015 | 52.39 | 2 |
| 2014 | 52.62 | 2 |
| 2013 | 51.92 | 1 |
| 2012 | 55.09 | 1 |
| 2011 | 53.11 | 3 |
| 2010 | 53.37 | 3 |
| 2009 | 47.86 | 5 |
| 2008 | 55.92 | 3 |
| 2007 | 56 | 2 |
| 2006 | 56.72 | 2 |
| 2005 | 54.84 | 3 |
| 2004 | 23.47 | 40 |
| 2003 | 33.6 | 22 |
| 2002 | 39.44 | 13 |
| 2001 | 41.81 | 9 |
| 2000 | 42.31 | 9 |
| 1999 | 39.75 | 13 |
| 1998 | 40.82 | 12 |
| 1997 | 39.94 | 18 |
| 1996 | 39 | 20 |
| 1995 | 35.84 | 25 |
| 1994 | 37.84 | 21 |
| 1993 | 32.46 | 30 |
| 1992 | 35.34 | 23 |
| 1991 | 36.5 | 25 |
| 1990 | 29.28 | 36 |
| 1989 | 31.66 | 28 |
| 1988 | 36.76 | 18 |
| 1987 | 33.11 | 22 |
| 1986 | 32.62 | 27 |