| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.51 | 38 |
| 2015 | 67.66 | 38 |
| 2014 | 67.7 | 36 |
| 2013 | 67.76 | 36 |
| 2012 | 67.77 | 35 |
| 2011 | 67.83 | 34 |
| 2010 | 67.91 | 34 |
| 2009 | 68.31 | 32 |
| 2008 | 68.71 | 32 |
| 2007 | 69.6 | 27 |
| 2006 | 69.95 | 27 |
| 2005 | 70.46 | 26 |
| 2004 | 71.03 | 25 |
| 2003 | 71.81 | 24 |
| 2002 | 72.55 | 21 |
| 2001 | 73.25 | 20 |
| 2000 | 73.95 | 19 |
| 1999 | 74.21 | 17 |
| 1998 | 74.52 | 17 |
| 1997 | 74.89 | 17 |
| 1996 | 75.13 | 18 |
| 1995 | 75.34 | 18 |
| 1994 | 75.64 | 18 |
| 1993 | 75.72 | 17 |
| 1992 | 75.74 | 18 |
| 1991 | 75.4 | 19 |