| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.17 | 97 |
| 2015 | 67.3 | 96 |
| 2014 | 66.99 | 97 |
| 2013 | 67.55 | 92 |
| 2012 | 68.35 | 88 |
| 2011 | 69.07 | 86 |
| 2010 | 68.55 | 89 |
| 2009 | 69.03 | 85 |
| 2008 | 68.97 | 95 |
| 2007 | 68.82 | 95 |
| 2006 | 69.1 | 92 |
| 2005 | 68.83 | 92 |
| 2004 | 69.65 | 85 |
| 2003 | 68.78 | 89 |
| 2002 | 69.01 | 86 |
| 2001 | 68.59 | 97 |
| 2000 | 68.04 | 101 |
| 1999 | 68.3 | 97 |
| 1998 | 65.55 | 117 |
| 1997 | 66.71 | 112 |
| 1996 | 65.49 | 120 |
| 1995 | 62.45 | 146 |
| 1994 | 64.52 | 131 |
| 1993 | 68.06 | 106 |
| 1992 | 67.74 | 109 |
| 1991 | 66.31 | 126 |