| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 66.96 | 63 |
| 2015 | 67.11 | 61 |
| 2014 | 67.26 | 60 |
| 2013 | 67.08 | 59 |
| 2012 | 67.46 | 57 |
| 2011 | 67.64 | 56 |
| 2010 | 68.82 | 47 |
| 2009 | 69.97 | 46 |
| 2008 | 69.9 | 45 |
| 2007 | 69.72 | 45 |
| 2006 | 70.14 | 42 |
| 2005 | 70.46 | 40 |
| 2004 | 69.69 | 44 |
| 2003 | 68.96 | 48 |
| 2002 | 68.89 | 48 |
| 2001 | 68.08 | 50 |
| 2000 | 68.49 | 46 |
| 1999 | 68.89 | 46 |
| 1998 | 68.16 | 48 |
| 1997 | 68.19 | 49 |
| 1996 | 67.49 | 53 |
| 1995 | 69.5 | 44 |
| 1994 | 69.38 | 45 |
| 1993 | 69.26 | 44 |
| 1992 | 69.47 | 44 |
| 1991 | 67.13 | 52 |
| 1990 | 64.87 | 75 |