| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 58.4 | 41 |
| 2015 | 58.73 | 40 |
| 2014 | 59.24 | 39 |
| 2013 | 59.4 | 38 |
| 2012 | 59.99 | 38 |
| 2011 | 59.69 | 37 |
| 2010 | 59.62 | 37 |
| 2009 | 60.57 | 35 |
| 2008 | 61.32 | 35 |
| 2007 | 60.08 | 35 |
| 2006 | 58.42 | 38 |
| 2005 | 57.8 | 38 |
| 2004 | 58.12 | 36 |
| 2003 | 58.12 | 37 |
| 2002 | 58.42 | 36 |
| 2001 | 58.22 | 36 |
| 2000 | 58.29 | 36 |
| 1999 | 58.08 | 36 |
| 1998 | 57.33 | 36 |
| 1997 | 55.89 | 38 |
| 1996 | 54.6 | 42 |
| 1995 | 52.62 | 50 |
| 1994 | 52.56 | 50 |
| 1993 | 51.94 | 53 |
| 1992 | 51.93 | 53 |
| 1991 | 52.34 | 51 |