| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.77 | 42 |
| 2015 | 70.91 | 42 |
| 2014 | 70.96 | 41 |
| 2013 | 70.98 | 40 |
| 2012 | 70.94 | 40 |
| 2011 | 70.91 | 41 |
| 2010 | 70.88 | 42 |
| 2009 | 71.38 | 40 |
| 2008 | 71.84 | 35 |
| 2007 | 72.32 | 33 |
| 2006 | 72.86 | 31 |
| 2005 | 73.5 | 29 |
| 2004 | 74.22 | 28 |
| 2003 | 75.04 | 27 |
| 2002 | 75.9 | 25 |
| 2001 | 76.72 | 24 |
| 2000 | 77.46 | 20 |
| 1999 | 77.87 | 17 |
| 1998 | 78.22 | 17 |
| 1997 | 78.51 | 17 |
| 1996 | 78.74 | 18 |
| 1995 | 78.93 | 18 |
| 1994 | 79.07 | 18 |
| 1993 | 79.15 | 18 |
| 1992 | 79.21 | 18 |
| 1991 | 79.28 | 19 |
| 1990 | 79.37 | 19 |