| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.89 | 76 |
| 2015 | 70.69 | 77 |
| 2014 | 70.28 | 79 |
| 2013 | 69.9 | 81 |
| 2012 | 69.46 | 85 |
| 2011 | 69.04 | 87 |
| 2010 | 68.71 | 88 |
| 2009 | 68.44 | 89 |
| 2008 | 68.22 | 98 |
| 2007 | 68.06 | 101 |
| 2006 | 67.93 | 101 |
| 2005 | 67.83 | 98 |
| 2004 | 67.74 | 97 |
| 2003 | 67.64 | 94 |
| 2002 | 67.53 | 97 |
| 2001 | 67.38 | 104 |
| 2000 | 67.07 | 108 |
| 1999 | 66.65 | 107 |
| 1998 | 66.18 | 113 |
| 1997 | 66.01 | 115 |
| 1996 | 66.55 | 108 |
| 1995 | 67.18 | 109 |
| 1994 | 67.53 | 106 |
| 1993 | 67.94 | 107 |
| 1992 | 68.08 | 106 |
| 1991 | 68.12 | 112 |