| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 13 | 36 |
| 2015 | 12.833 | 43 |
| 2014 | 12.833 | 44 |
| 2013 | 13.5 | 42 |
| 2012 | 13.861 | 43 |
| 2011 | 14.451 | 35 |
| 2010 | 14.542 | 36 |
| 2009 | 14.541 | 46 |
| 2008 | 14.583 | 47 |
| 2007 | 14.611 | 48 |
| 2006 | 14.541 | 53 |
| 2005 | 14.541 | 53 |
| 2004 | 14.542 | 53 |
| 2003 | 14.992 | 60 |
| 2002 | 16.325 | 56 |
| 2001 | 17.008 | 59 |
| 2000 | 17.302 | 58 |
| 1999 | 17.108 | 64 |
| 1998 | 16.768 | 69 |
| 1997 | 17.044 | 63 |
| 1996 | 17.793 | 66 |
| 1995 | 19.22 | 50 |
| 1994 | 18.361 | 44 |
| 1993 | 19.363 | 42 |
| 1992 | 28.688 | 19 |
| 1991 | 33.55 | 19 |
| 1990 | 32.75 | 13 |
| 1989 | 18.938 | 28 |
| 1988 | 15.069 | 34 |
| 1987 | 15 | 32 |
| 1986 | 15 | 34 |