| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 71.86 | 107 |
| 2015 | 71.82 | 107 |
| 2014 | 71.81 | 107 |
| 2013 | 72.04 | 107 |
| 2012 | 72.01 | 106 |
| 2011 | 71.79 | 109 |
| 2010 | 71.65 | 110 |
| 2009 | 71.65 | 113 |
| 2008 | 72.01 | 112 |
| 2007 | 72.52 | 110 |
| 2006 | 72.32 | 113 |
| 2005 | 72.56 | 110 |
| 2004 | 73.19 | 103 |
| 2003 | 73.17 | 105 |
| 2002 | 73.66 | 104 |
| 2001 | 73.15 | 113 |
| 2000 | 73.42 | 111 |
| 1999 | 73.6 | 110 |
| 1998 | 74.28 | 104 |
| 1997 | 75.27 | 101 |
| 1996 | 75.31 | 101 |
| 1995 | 75.25 | 101 |
| 1994 | 75.06 | 104 |
| 1993 | 74.34 | 111 |
| 1992 | 74.44 | 114 |
| 1991 | 74.02 | 122 |
| 1990 | 73.38 | 128 |