| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 52.96 | 91 |
| 2015 | 53.35 | 90 |
| 2014 | 53.73 | 89 |
| 2013 | 53.67 | 90 |
| 2012 | 52.83 | 93 |
| 2011 | 52.5 | 96 |
| 2010 | 51.83 | 98 |
| 2009 | 52.88 | 90 |
| 2008 | 52.67 | 90 |
| 2007 | 52.48 | 90 |
| 2006 | 51.99 | 93 |
| 2005 | 51.66 | 93 |
| 2004 | 51.35 | 94 |
| 2003 | 50.98 | 96 |
| 2002 | 51.11 | 95 |
| 2001 | 49.75 | 103 |
| 2000 | 49.03 | 103 |
| 1999 | 48.65 | 103 |
| 1998 | 48.25 | 102 |
| 1997 | 47.84 | 105 |
| 1996 | 47.69 | 106 |
| 1995 | 47.49 | 104 |
| 1994 | 46.75 | 109 |
| 1993 | 46.32 | 107 |
| 1992 | 46.92 | 101 |
| 1991 | 48.12 | 93 |
| 1990 | 47.25 | 94 |