| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 11.26 | 65 |
| 2014 | 11.45 | 65 |
| 2013 | 12.14 | 64 |
| 2012 | 11.47 | 66 |
| 2011 | 10.87 | 70 |
| 2010 | 11.19 | 69 |
| 2009 | 11.83 | 67 |
| 2008 | 12.7 | 63 |
| 2007 | 13.91 | 56 |
| 2006 | 14.5 | 60 |
| 2005 | 14.06 | 64 |
| 2004 | 14.53 | 63 |
| 2003 | 14.76 | 63 |
| 2002 | 15.32 | 59 |
| 2001 | 14.85 | 66 |
| 2000 | 17.06 | 61 |
| 1999 | 19.06 | 57 |
| 1998 | 16.77 | 67 |
| 1997 | 17.33 | 65 |
| 1996 | 20.05 | 56 |
| 1995 | 20.05 | 58 |
| 1994 | 20.88 | 56 |
| 1993 | 19.78 | 56 |
| 1992 | 20.14 | 55 |
| 1991 | 20.65 | 54 |
| 1990 | 20.41 | 57 |
| 1989 | 22.16 | 50 |
| 1988 | 19.53 | 53 |
| 1987 | 23.03 | 46 |
| 1986 | 20.9 | 47 |