| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 73.94 | 95 |
| 2015 | 73.58 | 95 |
| 2014 | 72.99 | 99 |
| 2013 | 72.46 | 101 |
| 2012 | 72.23 | 104 |
| 2011 | 72.5 | 104 |
| 2010 | 72.26 | 107 |
| 2009 | 68.62 | 138 |
| 2008 | 69.08 | 136 |
| 2007 | 68.47 | 141 |
| 2006 | 68.05 | 143 |
| 2005 | 67.66 | 145 |
| 2004 | 67.29 | 146 |
| 2003 | 66.99 | 151 |
| 2002 | 66.7 | 151 |
| 2001 | 66.37 | 156 |
| 2000 | 66.53 | 155 |
| 1999 | 66.92 | 154 |
| 1998 | 67.38 | 153 |
| 1997 | 67.76 | 156 |
| 1996 | 68.19 | 157 |
| 1995 | 68.49 | 156 |
| 1994 | 68.6 | 157 |
| 1993 | 68.57 | 158 |
| 1992 | 69.13 | 159 |
| 1991 | 70.84 | 149 |
| 1990 | 71.11 | 149 |