| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 83.96 | 180 |
| 2015 | 85.31 | 181 |
| 2014 | 86.45 | 180 |
| 2013 | 87.75 | 180 |
| 2012 | 89.1 | 181 |
| 2011 | 90.19 | 185 |
| 2010 | 90.82 | 186 |
| 2009 | 91.5 | 186 |
| 2008 | 91.89 | 185 |
| 2007 | 92.09 | 185 |
| 2006 | 92.29 | 185 |
| 2005 | 92.59 | 185 |
| 2004 | 92.91 | 185 |
| 2003 | 93.3 | 185 |
| 2002 | 93.61 | 185 |
| 2001 | 93.62 | 184 |
| 2000 | 93.17 | 184 |
| 1999 | 93.11 | 183 |
| 1998 | 92.66 | 182 |
| 1997 | 91.95 | 182 |
| 1996 | 91.2 | 178 |
| 1995 | 90.46 | 173 |
| 1994 | 89.92 | 170 |
| 1993 | 89.76 | 166 |
| 1992 | 89.69 | 163 |
| 1991 | 89.29 | 162 |
| 1990 | 88.37 | 158 |
| 1989 | 90.53 | 161 |
| 1988 | 92.08 | 171 |
| 1987 | 93.24 | 174 |
| 1986 | 94.27 | 178 |