| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 13.102 | 35 |
| 2015 | 13.228 | 40 |
| 2014 | 13.773 | 38 |
| 2013 | 13.598 | 37 |
| 2012 | 13.487 | 46 |
| 2011 | 13.43 | 44 |
| 2010 | 13.342 | 44 |
| 2009 | 13.849 | 52 |
| 2008 | 13.392 | 57 |
| 2007 | 12.837 | 67 |
| 2006 | 12.763 | 64 |
| 2005 | 13.033 | 62 |
| 2004 | 13.811 | 59 |
| 2003 | 14.978 | 61 |
| 2002 | 16.864 | 51 |
| 2001 | 18.958 | 50 |
| 2000 | 20.882 | 44 |
| 1999 | 19.512 | 54 |
| 1998 | 16.564 | 70 |
| 1997 | 18.638 | 59 |
| 1996 | 22.717 | 41 |
| 1995 | 21.158 | 41 |
| 1994 | 22.933 | 36 |
| 1993 | 24.733 | 36 |
| 1992 | 19.492 | 37 |
| 1991 | 34.083 | 18 |
| 1990 | 23.267 | 22 |
| 1989 | 16 | 40 |
| 1988 | 15.167 | 33 |
| 1987 | 14 | 39 |
| 1986 | 13.167 | 48 |