| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.35 | 72 |
| 2015 | 51.78 | 71 |
| 2014 | 52.14 | 66 |
| 2013 | 52.09 | 67 |
| 2012 | 51.38 | 69 |
| 2011 | 51.03 | 72 |
| 2010 | 50.01 | 73 |
| 2009 | 50.59 | 72 |
| 2008 | 51.1 | 73 |
| 2007 | 50.71 | 72 |
| 2006 | 50.05 | 74 |
| 2005 | 49.38 | 72 |
| 2004 | 48.49 | 77 |
| 2003 | 47.81 | 76 |
| 2002 | 48.09 | 74 |
| 2001 | 47.85 | 75 |
| 2000 | 47.06 | 80 |
| 1999 | 46.09 | 84 |
| 1998 | 46.33 | 82 |
| 1997 | 46.85 | 79 |
| 1996 | 46.55 | 84 |
| 1995 | 46.09 | 85 |
| 1994 | 45.96 | 85 |
| 1993 | 45.42 | 86 |
| 1992 | 46.03 | 84 |
| 1991 | 47.36 | 79 |