| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 76.62 | 166 |
| 2015 | 77.3 | 166 |
| 2014 | 78.29 | 167 |
| 2013 | 79.24 | 166 |
| 2012 | 80.11 | 167 |
| 2011 | 80.82 | 170 |
| 2010 | 81.33 | 170 |
| 2009 | 82.27 | 172 |
| 2008 | 82.97 | 173 |
| 2007 | 83.5 | 173 |
| 2006 | 83.93 | 172 |
| 2005 | 84.29 | 172 |
| 2004 | 84.9 | 172 |
| 2003 | 85.55 | 172 |
| 2002 | 86.07 | 172 |
| 2001 | 86.24 | 171 |
| 2000 | 85.97 | 168 |
| 1999 | 86.02 | 166 |
| 1998 | 85.73 | 165 |
| 1997 | 85.31 | 161 |
| 1996 | 84.93 | 158 |
| 1995 | 84.48 | 153 |
| 1994 | 83.89 | 148 |
| 1993 | 84 | 143 |
| 1992 | 84.25 | 142 |
| 1991 | 84.14 | 143 |
| 1990 | 83.5 | 140 |
| 1989 | 84.02 | 140 |
| 1988 | 84.04 | 137 |
| 1987 | 83.75 | 136 |
| 1986 | 83.38 | 134 |