| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.28 | 142 |
| 2015 | 67.55 | 143 |
| 2014 | 68.24 | 141 |
| 2013 | 68.96 | 141 |
| 2012 | 69.78 | 142 |
| 2011 | 70.61 | 142 |
| 2010 | 71.21 | 140 |
| 2009 | 71.96 | 140 |
| 2008 | 72.68 | 141 |
| 2007 | 73.49 | 141 |
| 2006 | 74.43 | 139 |
| 2005 | 75.35 | 138 |
| 2004 | 75.92 | 138 |
| 2003 | 76.63 | 135 |
| 2002 | 77.56 | 135 |
| 2001 | 78.65 | 136 |
| 2000 | 79.67 | 132 |
| 1999 | 80.98 | 131 |
| 1998 | 82.56 | 134 |
| 1997 | 84.36 | 138 |
| 1996 | 86.12 | 138 |
| 1995 | 87.5 | 142 |
| 1994 | 88.44 | 141 |
| 1993 | 88.9 | 138 |
| 1992 | 88.94 | 134 |
| 1991 | 88.87 | 133 |
| 1990 | 88.88 | 132 |
| 1989 | 88 | 126 |
| 1988 | 87.01 | 126 |
| 1987 | 85.81 | 123 |
| 1986 | 84.15 | 118 |