| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.28 | 57 |
| 2015 | 1.34 | 58 |
| 2014 | 1.39 | 56 |
| 2013 | 1.42 | 56 |
| 2012 | 1.42 | 58 |
| 2011 | 1.39 | 61 |
| 2010 | 1.36 | 64 |
| 2009 | 1.33 | 66 |
| 2008 | 1.33 | 70 |
| 2007 | 1.34 | 67 |
| 2006 | 1.38 | 68 |
| 2005 | 1.42 | 62 |
| 2004 | 1.48 | 58 |
| 2003 | 1.57 | 57 |
| 2002 | 1.71 | 52 |
| 2001 | 1.89 | 46 |
| 2000 | 2.09 | 37 |
| 1999 | 2.29 | 32 |
| 1998 | 2.28 | 32 |
| 1997 | 2.37 | 32 |
| 1996 | 2.57 | 26 |
| 1995 | 2.79 | 22 |
| 1994 | 2.99 | 17 |
| 1993 | 3.12 | 17 |
| 1992 | 3.13 | 15 |
| 1991 | 3.03 | 17 |
| 1990 | 2.82 | 21 |
| 1989 | 2.6 | 30 |
| 1988 | 2.48 | 36 |
| 1987 | 2.56 | 36 |
| 1986 | 2.78 | 28 |