| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 69.92 | 79 |
| 2015 | 69.7 | 79 |
| 2014 | 69.48 | 77 |
| 2013 | 69.27 | 76 |
| 2012 | 69.07 | 76 |
| 2011 | 68.88 | 75 |
| 2010 | 68.69 | 75 |
| 2009 | 68.5 | 74 |
| 2008 | 68.33 | 75 |
| 2007 | 68.15 | 75 |
| 2006 | 67.97 | 74 |
| 2005 | 67.79 | 72 |
| 2004 | 67.6 | 73 |
| 2003 | 67.43 | 73 |
| 2002 | 67.28 | 73 |
| 2001 | 67.18 | 73 |
| 2000 | 67.15 | 73 |
| 1999 | 67.11 | 73 |
| 1998 | 67.07 | 74 |
| 1997 | 67.03 | 74 |
| 1996 | 66.99 | 73 |
| 1995 | 66.95 | 72 |
| 1994 | 66.91 | 72 |
| 1993 | 66.87 | 72 |
| 1992 | 66.84 | 72 |
| 1991 | 66.8 | 70 |
| 1990 | 66.76 | 69 |
| 1989 | 66.72 | 68 |
| 1988 | 66.4 | 68 |
| 1987 | 65.83 | 67 |
| 1986 | 65.26 | 70 |