| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 71.53 | 110 |
| 2015 | 71.36 | 111 |
| 2014 | 71.21 | 115 |
| 2013 | 71.05 | 117 |
| 2012 | 70.88 | 118 |
| 2011 | 70.71 | 118 |
| 2010 | 70.52 | 120 |
| 2009 | 70.19 | 125 |
| 2008 | 69.99 | 128 |
| 2007 | 69.76 | 129 |
| 2006 | 69.58 | 129 |
| 2005 | 69.42 | 129 |
| 2004 | 69.25 | 133 |
| 2003 | 69.1 | 135 |
| 2002 | 68.98 | 138 |
| 2001 | 68.92 | 142 |
| 2000 | 68.93 | 144 |
| 1999 | 69.8 | 139 |
| 1998 | 70.72 | 135 |
| 1997 | 71.68 | 129 |
| 1996 | 72.62 | 121 |
| 1995 | 73.49 | 117 |
| 1994 | 74.4 | 109 |
| 1993 | 75.25 | 102 |
| 1992 | 76.02 | 98 |
| 1991 | 76.74 | 95 |
| 1990 | 77.39 | 91 |