| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 14.73 | 40 |
| 2015 | 14.62 | 39 |
| 2014 | 14.49 | 37 |
| 2013 | 14.38 | 35 |
| 2012 | 14.31 | 33 |
| 2011 | 14.29 | 31 |
| 2010 | 14.31 | 30 |
| 2009 | 14.36 | 30 |
| 2008 | 14.45 | 30 |
| 2007 | 14.52 | 29 |
| 2006 | 14.51 | 28 |
| 2005 | 14.35 | 29 |
| 2004 | 14.15 | 29 |
| 2003 | 13.77 | 31 |
| 2002 | 13.3 | 32 |
| 2001 | 12.82 | 32 |
| 2000 | 12.41 | 34 |
| 1999 | 12.18 | 36 |
| 1998 | 12.02 | 36 |
| 1997 | 11.9 | 36 |
| 1996 | 11.7 | 36 |
| 1995 | 11.38 | 38 |
| 1994 | 11.08 | 38 |
| 1993 | 10.67 | 40 |
| 1992 | 10.18 | 43 |
| 1991 | 9.71 | 45 |
| 1990 | 9.31 | 45 |
| 1989 | 9.08 | 44 |
| 1988 | 8.95 | 44 |
| 1987 | 8.9 | 44 |
| 1986 | 8.89 | 43 |