| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 65.4 | 74 |
| 2015 | 65.35 | 74 |
| 2014 | 65.3 | 74 |
| 2013 | 65.17 | 75 |
| 2012 | 65.73 | 71 |
| 2011 | 66.1 | 68 |
| 2010 | 65.35 | 73 |
| 2009 | 65.41 | 73 |
| 2008 | 65 | 76 |
| 2007 | 64.58 | 81 |
| 2006 | 64.1 | 85 |
| 2005 | 62.85 | 92 |
| 2004 | 62.74 | 90 |
| 2003 | 62.61 | 91 |
| 2002 | 63.6 | 82 |
| 2001 | 64.56 | 77 |
| 2000 | 63.3 | 84 |
| 1999 | 63.24 | 83 |
| 1998 | 63.16 | 86 |
| 1997 | 63.09 | 86 |
| 1996 | 63.04 | 88 |
| 1995 | 63.02 | 86 |
| 1994 | 62.11 | 91 |
| 1993 | 60.94 | 102 |
| 1992 | 61.74 | 96 |
| 1991 | 60.72 | 102 |
| 1990 | 60.47 | 103 |