| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 63.83 | 87 |
| 2015 | 64 | 86 |
| 2014 | 64.15 | 84 |
| 2013 | 63.73 | 88 |
| 2012 | 63.56 | 91 |
| 2011 | 62.92 | 95 |
| 2010 | 63.21 | 92 |
| 2009 | 63.09 | 95 |
| 2008 | 62.9 | 97 |
| 2007 | 62.95 | 95 |
| 2006 | 62.51 | 95 |
| 2005 | 62.16 | 96 |
| 2004 | 61.86 | 94 |
| 2003 | 61.35 | 98 |
| 2002 | 60.97 | 103 |
| 2001 | 61.64 | 97 |
| 2000 | 61.55 | 96 |
| 1999 | 61.13 | 99 |
| 1998 | 60.69 | 107 |
| 1997 | 60.96 | 100 |
| 1996 | 61.26 | 99 |
| 1995 | 61.95 | 94 |
| 1994 | 61.81 | 95 |
| 1993 | 61.31 | 99 |
| 1992 | 60.15 | 108 |
| 1991 | 59.65 | 112 |
| 1990 | 59.34 | 113 |