| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 88.09 | 177 |
| 2015 | 88.15 | 176 |
| 2014 | 88.45 | 176 |
| 2013 | 88.55 | 175 |
| 2012 | 88.46 | 177 |
| 2011 | 88.22 | 176 |
| 2010 | 87.86 | 176 |
| 2009 | 87.79 | 172 |
| 2008 | 87.65 | 169 |
| 2007 | 87.43 | 167 |
| 2006 | 87.09 | 165 |
| 2005 | 86.6 | 163 |
| 2004 | 86.69 | 162 |
| 2003 | 86.76 | 162 |
| 2002 | 86.79 | 159 |
| 2001 | 86.76 | 157 |
| 2000 | 86.62 | 155 |
| 1999 | 87.22 | 153 |
| 1998 | 87.82 | 150 |
| 1997 | 88.38 | 149 |
| 1996 | 88.82 | 149 |
| 1995 | 89.08 | 148 |
| 1994 | 89.95 | 147 |
| 1993 | 90.71 | 146 |
| 1992 | 91.29 | 148 |
| 1991 | 91.66 | 148 |
| 1990 | 91.76 | 151 |
| 1989 | 92.32 | 150 |
| 1988 | 92.66 | 149 |
| 1987 | 92.74 | 146 |
| 1986 | 92.51 | 145 |