| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 71.94 | 158 |
| 2015 | 72.27 | 157 |
| 2014 | 72.9 | 157 |
| 2013 | 73.62 | 156 |
| 2012 | 74.4 | 156 |
| 2011 | 75.16 | 157 |
| 2010 | 75.77 | 157 |
| 2009 | 76.06 | 159 |
| 2008 | 76.24 | 159 |
| 2007 | 76.36 | 159 |
| 2006 | 76.57 | 158 |
| 2005 | 76.98 | 157 |
| 2004 | 77.53 | 155 |
| 2003 | 78.22 | 154 |
| 2002 | 78.97 | 154 |
| 2001 | 79.65 | 152 |
| 2000 | 80.16 | 152 |
| 1999 | 81.11 | 152 |
| 1998 | 81.98 | 152 |
| 1997 | 82.83 | 150 |
| 1996 | 83.78 | 154 |
| 1995 | 84.92 | 155 |
| 1994 | 86.01 | 158 |
| 1993 | 87.25 | 157 |
| 1992 | 88.59 | 161 |
| 1991 | 89.91 | 165 |
| 1990 | 91.13 | 171 |
| 1989 | 91.62 | 170 |
| 1988 | 91.97 | 170 |
| 1987 | 92.2 | 169 |
| 1986 | 92.43 | 170 |