| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 68.84 | 48 |
| 2015 | 69.19 | 47 |
| 2014 | 69.19 | 47 |
| 2013 | 69.46 | 45 |
| 2012 | 69.94 | 44 |
| 2011 | 70.49 | 43 |
| 2010 | 71.05 | 39 |
| 2009 | 70.2 | 44 |
| 2008 | 69.21 | 47 |
| 2007 | 68.28 | 50 |
| 2006 | 67.47 | 54 |
| 2005 | 66.81 | 58 |
| 2004 | 65.74 | 67 |
| 2003 | 65.46 | 68 |
| 2002 | 65.38 | 69 |
| 2001 | 65.66 | 68 |
| 2000 | 65.69 | 65 |
| 1999 | 65.15 | 70 |
| 1998 | 64.83 | 73 |
| 1997 | 64.81 | 73 |
| 1996 | 65.04 | 70 |
| 1995 | 65.37 | 66 |
| 1994 | 65.07 | 69 |
| 1993 | 64.77 | 72 |
| 1992 | 64.57 | 78 |
| 1991 | 64.51 | 79 |
| 1990 | 64.35 | 79 |