| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 69.13 | 88 |
| 2015 | 69.17 | 87 |
| 2014 | 69.25 | 87 |
| 2013 | 69.65 | 87 |
| 2012 | 69.56 | 84 |
| 2011 | 69.16 | 85 |
| 2010 | 68.78 | 86 |
| 2009 | 68.73 | 87 |
| 2008 | 69.39 | 90 |
| 2007 | 69.86 | 86 |
| 2006 | 69.49 | 88 |
| 2005 | 69.65 | 88 |
| 2004 | 70.26 | 79 |
| 2003 | 70.33 | 76 |
| 2002 | 70.91 | 76 |
| 2001 | 69.81 | 88 |
| 2000 | 69.73 | 85 |
| 1999 | 68.25 | 98 |
| 1998 | 68.39 | 95 |
| 1997 | 73.1 | 68 |
| 1996 | 73.49 | 66 |
| 1995 | 73.47 | 70 |
| 1994 | 72.87 | 75 |
| 1993 | 71.83 | 83 |
| 1992 | 72.32 | 80 |
| 1991 | 71.97 | 86 |