| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 79.55 | 173 |
| 2015 | 79.99 | 173 |
| 2014 | 80.53 | 173 |
| 2013 | 80.93 | 173 |
| 2012 | 81.21 | 173 |
| 2011 | 81.4 | 173 |
| 2010 | 81.51 | 172 |
| 2009 | 81.94 | 169 |
| 2008 | 82.39 | 169 |
| 2007 | 82.83 | 168 |
| 2006 | 83.22 | 169 |
| 2005 | 83.47 | 171 |
| 2004 | 84.22 | 171 |
| 2003 | 84.96 | 171 |
| 2002 | 85.68 | 171 |
| 2001 | 86.37 | 172 |
| 2000 | 87.02 | 174 |
| 1999 | 88.15 | 176 |
| 1998 | 89.24 | 175 |
| 1997 | 90.21 | 177 |
| 1996 | 90.93 | 176 |
| 1995 | 91.35 | 175 |
| 1994 | 92.11 | 174 |
| 1993 | 92.59 | 175 |
| 1992 | 92.79 | 176 |
| 1991 | 92.71 | 176 |
| 1990 | 92.37 | 174 |
| 1989 | 92.38 | 173 |
| 1988 | 92.21 | 172 |
| 1987 | 91.83 | 167 |
| 1986 | 91.2 | 164 |