| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 52.34 | 87 |
| 2015 | 52.06 | 84 |
| 2014 | 51.86 | 87 |
| 2013 | 51.79 | 92 |
| 2012 | 51.82 | 89 |
| 2011 | 51.83 | 89 |
| 2010 | 51.76 | 89 |
| 2009 | 51.49 | 87 |
| 2008 | 51.16 | 81 |
| 2007 | 50.77 | 77 |
| 2006 | 50.34 | 70 |
| 2005 | 49.87 | 63 |
| 2004 | 49.42 | 53 |
| 2003 | 48.92 | 46 |
| 2002 | 48.41 | 45 |
| 2001 | 47.9 | 40 |
| 2000 | 47.4 | 33 |
| 1999 | 47.14 | 25 |
| 1998 | 46.95 | 21 |
| 1997 | 46.81 | 19 |
| 1996 | 46.66 | 17 |
| 1995 | 46.5 | 13 |
| 1994 | 46.3 | 13 |
| 1993 | 46.02 | 13 |
| 1992 | 45.66 | 13 |
| 1991 | 45.2 | 10 |
| 1990 | 44.65 | 9 |
| 1989 | 44.27 | 6 |
| 1988 | 43.83 | 5 |
| 1987 | 43.48 | 3 |
| 1986 | 43.48 | 2 |