| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.14 | 81 |
| 2015 | 70.12 | 81 |
| 2014 | 69.68 | 84 |
| 2013 | 69.86 | 83 |
| 2012 | 70.1 | 79 |
| 2011 | 69.57 | 82 |
| 2010 | 69.88 | 81 |
| 2009 | 68.79 | 86 |
| 2008 | 69.8 | 86 |
| 2007 | 70.34 | 83 |
| 2006 | 70.59 | 80 |
| 2005 | 68.85 | 91 |
| 2004 | 67.26 | 102 |
| 2003 | 62.79 | 133 |
| 2002 | 60.38 | 151 |
| 2001 | 61.98 | 144 |
| 2000 | 63.79 | 133 |
| 1999 | 64.84 | 125 |
| 1998 | 66.37 | 112 |
| 1997 | 65.55 | 118 |
| 1996 | 64.02 | 133 |
| 1995 | 63.37 | 143 |
| 1994 | 68.13 | 103 |
| 1993 | 70.06 | 92 |
| 1992 | 71.34 | 87 |
| 1991 | 72.48 | 81 |