| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 36.75 | 92 |
| 2015 | 36.79 | 92 |
| 2014 | 36.9 | 94 |
| 2013 | 36.79 | 93 |
| 2012 | 36.7 | 94 |
| 2011 | 36.41 | 97 |
| 2010 | 36.17 | 97 |
| 2009 | 36.18 | 98 |
| 2008 | 36.26 | 109 |
| 2007 | 36.42 | 105 |
| 2006 | 36.6 | 104 |
| 2005 | 36.79 | 102 |
| 2004 | 36.77 | 102 |
| 2003 | 36.7 | 101 |
| 2002 | 44.03 | 62 |
| 2001 | 43.13 | 72 |
| 2000 | 42.93 | 74 |
| 1999 | 43.67 | 71 |
| 1998 | 43.68 | 72 |
| 1997 | 43.71 | 76 |
| 1996 | 43.75 | 78 |
| 1995 | 44.38 | 75 |
| 1994 | 43.56 | 79 |
| 1993 | 43.51 | 84 |
| 1992 | 43.85 | 87 |
| 1991 | 43.63 | 88 |