| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.61 | 93 |
| 2015 | 67.63 | 93 |
| 2014 | 67.8 | 91 |
| 2013 | 67.43 | 94 |
| 2012 | 67.31 | 93 |
| 2011 | 67.55 | 94 |
| 2010 | 67.73 | 95 |
| 2009 | 68.38 | 91 |
| 2008 | 69.94 | 85 |
| 2007 | 70.31 | 84 |
| 2006 | 69.97 | 84 |
| 2005 | 70.01 | 82 |
| 2004 | 69.94 | 82 |
| 2003 | 70.21 | 80 |
| 2002 | 70.77 | 77 |
| 2001 | 71.79 | 71 |
| 2000 | 72.67 | 65 |
| 1999 | 73.2 | 64 |
| 1998 | 74.14 | 59 |
| 1997 | 75.2 | 55 |
| 1996 | 75.18 | 58 |
| 1995 | 75.3 | 58 |
| 1994 | 75.72 | 57 |
| 1993 | 76.31 | 55 |
| 1992 | 76.45 | 57 |
| 1991 | 76.11 | 58 |