| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 72.66 | 23 |
| 2015 | 72.7 | 24 |
| 2014 | 72.82 | 23 |
| 2013 | 72.79 | 23 |
| 2012 | 72.76 | 21 |
| 2011 | 72.72 | 22 |
| 2010 | 72.68 | 21 |
| 2009 | 72.63 | 21 |
| 2008 | 72.35 | 23 |
| 2007 | 72.07 | 24 |
| 2006 | 71.02 | 26 |
| 2005 | 69.99 | 27 |
| 2004 | 68.98 | 30 |
| 2003 | 67.89 | 30 |
| 2002 | 67.5 | 32 |
| 2001 | 65.94 | 40 |
| 2000 | 66.22 | 36 |
| 1999 | 66.01 | 37 |
| 1998 | 64.18 | 44 |
| 1997 | 63.74 | 46 |
| 1996 | 63.29 | 48 |
| 1995 | 65.78 | 36 |
| 1994 | 64.83 | 38 |
| 1993 | 64.59 | 39 |
| 1992 | 64.31 | 38 |
| 1991 | 64.01 | 42 |