| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.21 | 40 |
| 2015 | 67.3 | 40 |
| 2014 | 67.28 | 38 |
| 2013 | 67.3 | 39 |
| 2012 | 67.28 | 39 |
| 2011 | 67.26 | 37 |
| 2010 | 67.19 | 38 |
| 2009 | 66.99 | 39 |
| 2008 | 67.54 | 38 |
| 2007 | 68.13 | 31 |
| 2006 | 68.77 | 30 |
| 2005 | 69.46 | 29 |
| 2004 | 70.1 | 27 |
| 2003 | 70.73 | 27 |
| 2002 | 71.34 | 26 |
| 2001 | 71.97 | 23 |
| 2000 | 72.61 | 23 |
| 1999 | 73.25 | 19 |
| 1998 | 73.91 | 18 |
| 1997 | 74.58 | 18 |
| 1996 | 75.24 | 17 |
| 1995 | 75.88 | 16 |
| 1994 | 76.46 | 15 |
| 1993 | 77 | 14 |
| 1992 | 77.55 | 13 |
| 1991 | 78.09 | 12 |