| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.84 | 135 |
| 2015 | 51.24 | 137 |
| 2014 | 50.57 | 140 |
| 2013 | 49.55 | 144 |
| 2012 | 50.64 | 139 |
| 2011 | 52.67 | 125 |
| 2010 | 54.42 | 115 |
| 2009 | 55.42 | 108 |
| 2008 | 57.33 | 103 |
| 2007 | 57.33 | 102 |
| 2006 | 57.48 | 98 |
| 2005 | 57.34 | 97 |
| 2004 | 57.77 | 90 |
| 2003 | 58.08 | 80 |
| 2002 | 59.1 | 76 |
| 2001 | 59.11 | 75 |
| 2000 | 58.54 | 76 |
| 1999 | 57.55 | 85 |
| 1998 | 57.45 | 89 |
| 1997 | 55.53 | 101 |
| 1996 | 54.34 | 109 |
| 1995 | 54.03 | 113 |
| 1994 | 54.7 | 108 |
| 1993 | 55.38 | 103 |
| 1992 | 56.41 | 93 |
| 1991 | 58.47 | 77 |