| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.44 | 70 |
| 2015 | 1.46 | 75 |
| 2014 | 1.36 | 82 |
| 2013 | 1.33 | 86 |
| 2012 | 1.41 | 75 |
| 2011 | 1.46 | 72 |
| 2010 | 1.42 | 79 |
| 2009 | 1.23 | 103 |
| 2008 | 1.12 | 116 |
| 2007 | 1.19 | 107 |
| 2006 | 1.19 | 108 |
| 2005 | 1.17 | 113 |
| 2004 | 1.2 | 113 |
| 2003 | 1.2 | 113 |
| 2002 | 1.26 | 109 |
| 2001 | 1.35 | 98 |
| 2000 | 1.44 | 90 |
| 1999 | 1.47 | 86 |
| 1998 | 1.45 | 89 |
| 1997 | 1.45 | 97 |
| 1996 | 1.41 | 96 |
| 1995 | 1.64 | 85 |
| 1994 | 1.63 | 95 |
| 1993 | 1.49 | 103 |
| 1992 | 1.39 | 104 |
| 1991 | 1.26 | 99 |
| 1990 | 1.24 | 99 |
| 1989 | 1.32 | 96 |
| 1988 | 1.27 | 95 |
| 1987 | 1.18 | 99 |
| 1986 | 1.16 | 94 |