| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.4 | 57 |
| 2015 | 67.58 | 56 |
| 2014 | 67.81 | 54 |
| 2013 | 67.91 | 53 |
| 2012 | 67.77 | 54 |
| 2011 | 67.97 | 52 |
| 2010 | 67.65 | 55 |
| 2009 | 67.85 | 53 |
| 2008 | 68.1 | 51 |
| 2007 | 68.11 | 51 |
| 2006 | 67.84 | 50 |
| 2005 | 67.27 | 54 |
| 2004 | 66.46 | 62 |
| 2003 | 65.92 | 65 |
| 2002 | 66.17 | 65 |
| 2001 | 65.44 | 69 |
| 2000 | 64.79 | 73 |
| 1999 | 64.61 | 77 |
| 1998 | 64.51 | 76 |
| 1997 | 64.92 | 71 |
| 1996 | 65.11 | 69 |
| 1995 | 64.29 | 74 |
| 1994 | 63.72 | 80 |
| 1993 | 62.93 | 85 |
| 1992 | 62.99 | 84 |
| 1991 | 63.44 | 86 |
| 1990 | 63.68 | 85 |