| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 60.6 | 114 |
| 2015 | 60.53 | 116 |
| 2014 | 60.42 | 117 |
| 2013 | 60.33 | 118 |
| 2012 | 60.17 | 117 |
| 2011 | 59.94 | 120 |
| 2010 | 59.66 | 122 |
| 2009 | 59.35 | 124 |
| 2008 | 58.93 | 126 |
| 2007 | 58.56 | 126 |
| 2006 | 58.09 | 129 |
| 2005 | 57.88 | 130 |
| 2004 | 57.63 | 130 |
| 2003 | 57.53 | 130 |
| 2002 | 57.51 | 131 |
| 2001 | 57.35 | 135 |
| 2000 | 57.06 | 135 |
| 1999 | 56.6 | 137 |
| 1998 | 56.06 | 142 |
| 1997 | 55.52 | 142 |
| 1996 | 55.11 | 147 |
| 1995 | 54.9 | 149 |
| 1994 | 54.9 | 150 |
| 1993 | 55.05 | 148 |
| 1992 | 55.28 | 147 |
| 1991 | 55.5 | 145 |
| 1990 | 55.94 | 141 |