| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 59.67 | 56 |
| 2015 | 59.96 | 58 |
| 2014 | 60.24 | 57 |
| 2013 | 60.5 | 56 |
| 2012 | 60.74 | 55 |
| 2011 | 60.97 | 56 |
| 2010 | 61.17 | 57 |
| 2009 | 61.36 | 57 |
| 2008 | 61.53 | 58 |
| 2007 | 61.68 | 59 |
| 2006 | 61.82 | 61 |
| 2005 | 61.93 | 62 |
| 2004 | 62.03 | 62 |
| 2003 | 62.12 | 63 |
| 2002 | 62.2 | 63 |
| 2001 | 62.28 | 67 |
| 2000 | 62.36 | 67 |
| 1999 | 62.44 | 66 |
| 1998 | 62.53 | 66 |
| 1997 | 62.61 | 67 |
| 1996 | 62.69 | 68 |
| 1995 | 62.77 | 69 |
| 1994 | 62.85 | 68 |
| 1993 | 62.93 | 68 |
| 1992 | 63.01 | 68 |
| 1991 | 63.09 | 69 |
| 1990 | 63.18 | 70 |
| 1989 | 63.26 | 70 |
| 1988 | 63.46 | 72 |
| 1987 | 63.79 | 72 |
| 1986 | 64.13 | 74 |