| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 57 | 104 |
| 2015 | 56.44 | 106 |
| 2014 | 55.8 | 111 |
| 2013 | 55.23 | 110 |
| 2012 | 54.58 | 114 |
| 2011 | 54.34 | 116 |
| 2010 | 54.14 | 120 |
| 2009 | 54.73 | 112 |
| 2008 | 55.95 | 109 |
| 2007 | 55.76 | 111 |
| 2006 | 55.11 | 110 |
| 2005 | 54.81 | 111 |
| 2004 | 54.49 | 110 |
| 2003 | 55.15 | 105 |
| 2002 | 55.79 | 100 |
| 2001 | 55.37 | 105 |
| 2000 | 55.21 | 100 |
| 1999 | 55.85 | 97 |
| 1998 | 57.36 | 90 |
| 1997 | 58.34 | 82 |
| 1996 | 58.71 | 78 |
| 1995 | 58.97 | 74 |
| 1994 | 58.93 | 72 |
| 1993 | 58.73 | 75 |
| 1992 | 59.29 | 71 |
| 1991 | 59.88 | 68 |