| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.96 | 41 |
| 2015 | 71.09 | 40 |
| 2014 | 71.11 | 38 |
| 2013 | 70.93 | 41 |
| 2012 | 71.02 | 39 |
| 2011 | 71.35 | 38 |
| 2010 | 70.97 | 41 |
| 2009 | 70.75 | 43 |
| 2008 | 70.63 | 43 |
| 2007 | 69.79 | 43 |
| 2006 | 67.67 | 52 |
| 2005 | 66.18 | 63 |
| 2004 | 64.76 | 73 |
| 2003 | 63.42 | 84 |
| 2002 | 64.6 | 71 |
| 2001 | 66.5 | 62 |
| 2000 | 65.01 | 70 |
| 1999 | 65.7 | 68 |
| 1998 | 66.37 | 60 |
| 1997 | 66.74 | 53 |
| 1996 | 67.55 | 52 |
| 1995 | 59.85 | 118 |
| 1994 | 58.2 | 134 |
| 1993 | 58.27 | 130 |
| 1992 | 58.22 | 126 |
| 1991 | 57.52 | 129 |
| 1990 | 57.4 | 130 |