| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 77.05 | 158 |
| 2015 | 78.33 | 159 |
| 2014 | 79.57 | 159 |
| 2013 | 80.9 | 160 |
| 2012 | 82.23 | 161 |
| 2011 | 83.37 | 164 |
| 2010 | 84.18 | 164 |
| 2009 | 84.9 | 164 |
| 2008 | 85.33 | 162 |
| 2007 | 85.61 | 162 |
| 2006 | 86 | 163 |
| 2005 | 86.66 | 165 |
| 2004 | 87.48 | 163 |
| 2003 | 88.6 | 166 |
| 2002 | 89.89 | 167 |
| 2001 | 90.98 | 167 |
| 2000 | 91.61 | 166 |
| 1999 | 92.98 | 169 |
| 1998 | 94.1 | 169 |
| 1997 | 95.05 | 172 |
| 1996 | 96.11 | 174 |
| 1995 | 97.49 | 176 |
| 1994 | 99.48 | 178 |
| 1993 | 101.6 | 182 |
| 1992 | 103.72 | 188 |
| 1991 | 105.6 | 192 |
| 1990 | 107.06 | 192 |
| 1989 | 108.62 | 189 |
| 1988 | 109.9 | 190 |
| 1987 | 110.88 | 191 |
| 1986 | 111.56 | 191 |