| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 64.97 | 137 |
| 2015 | 65.3 | 138 |
| 2014 | 65.8 | 138 |
| 2013 | 66.44 | 138 |
| 2012 | 67.16 | 137 |
| 2011 | 67.84 | 137 |
| 2010 | 68.35 | 135 |
| 2009 | 69.29 | 136 |
| 2008 | 70.18 | 136 |
| 2007 | 71.08 | 135 |
| 2006 | 72.19 | 135 |
| 2005 | 73.63 | 134 |
| 2004 | 75.28 | 136 |
| 2003 | 77.18 | 138 |
| 2002 | 79.18 | 140 |
| 2001 | 80.99 | 143 |
| 2000 | 82.44 | 144 |
| 1999 | 83.97 | 144 |
| 1998 | 85.16 | 142 |
| 1997 | 86.06 | 143 |
| 1996 | 86.82 | 143 |
| 1995 | 87.55 | 143 |
| 1994 | 88.11 | 138 |
| 1993 | 88.57 | 135 |
| 1992 | 88.87 | 132 |
| 1991 | 88.84 | 132 |
| 1990 | 88.36 | 129 |
| 1989 | 88.4 | 129 |
| 1988 | 88.17 | 127 |
| 1987 | 87.75 | 127 |
| 1986 | 87.28 | 126 |