| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.49 | 102 |
| 2015 | 51.43 | 102 |
| 2014 | 51.36 | 103 |
| 2013 | 50.56 | 108 |
| 2012 | 50.6 | 108 |
| 2011 | 51 | 104 |
| 2010 | 50.62 | 106 |
| 2009 | 51.1 | 100 |
| 2008 | 50.7 | 100 |
| 2007 | 50.2 | 103 |
| 2006 | 50.67 | 99 |
| 2005 | 51.67 | 92 |
| 2004 | 52.71 | 86 |
| 2003 | 53.79 | 80 |
| 2002 | 54.9 | 70 |
| 2001 | 52.68 | 85 |
| 2000 | 49.06 | 102 |
| 1999 | 48.95 | 98 |
| 1998 | 48 | 107 |
| 1997 | 46.37 | 115 |
| 1996 | 44.02 | 120 |
| 1995 | 41.3 | 130 |
| 1994 | 37.38 | 139 |
| 1993 | 36.3 | 140 |
| 1992 | 38.03 | 137 |
| 1991 | 38.85 | 133 |
| 1990 | 37.2 | 134 |