| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 63.61 | 11 |
| 2015 | 63.92 | 10 |
| 2014 | 64.37 | 10 |
| 2013 | 65.93 | 9 |
| 2012 | 66.81 | 9 |
| 2011 | 67.63 | 9 |
| 2010 | 65.35 | 12 |
| 2009 | 69.47 | 8 |
| 2008 | 69.83 | 8 |
| 2007 | 70.03 | 8 |
| 2006 | 70.35 | 7 |
| 2005 | 72.91 | 6 |
| 2004 | 75.1 | 4 |
| 2003 | 69.9 | 8 |
| 2002 | 63.7 | 16 |
| 2001 | 57.02 | 25 |
| 2000 | 53.71 | 35 |
| 1999 | 46.56 | 55 |
| 1998 | 46.09 | 59 |
| 1997 | 45.93 | 58 |
| 1996 | 47.37 | 55 |
| 1995 | 48.03 | 55 |
| 1994 | 48.65 | 56 |
| 1993 | 47.4 | 59 |
| 1992 | 47.47 | 58 |
| 1991 | 47.51 | 67 |