| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 79.61 | 174 |
| 2015 | 79.82 | 172 |
| 2014 | 80.08 | 172 |
| 2013 | 80.26 | 172 |
| 2012 | 80.41 | 168 |
| 2011 | 80.52 | 168 |
| 2010 | 80.59 | 167 |
| 2009 | 80.82 | 167 |
| 2008 | 81.09 | 165 |
| 2007 | 81.39 | 166 |
| 2006 | 81.73 | 166 |
| 2005 | 82.1 | 167 |
| 2004 | 82.86 | 167 |
| 2003 | 83.68 | 167 |
| 2002 | 84.51 | 167 |
| 2001 | 85.34 | 168 |
| 2000 | 86.13 | 169 |
| 1999 | 87.17 | 170 |
| 1998 | 88.22 | 170 |
| 1997 | 89.18 | 174 |
| 1996 | 89.9 | 174 |
| 1995 | 90.3 | 172 |
| 1994 | 91.45 | 172 |
| 1993 | 92.32 | 174 |
| 1992 | 92.93 | 177 |
| 1991 | 93.41 | 179 |
| 1990 | 93.8 | 177 |
| 1989 | 94.43 | 178 |
| 1988 | 94.98 | 180 |
| 1987 | 95.35 | 182 |
| 1986 | 95.35 | 182 |