| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 84.39 | 171 |
| 2015 | 84.48 | 171 |
| 2014 | 84.31 | 168 |
| 2013 | 83.99 | 165 |
| 2012 | 83.49 | 163 |
| 2011 | 82.78 | 162 |
| 2010 | 81.83 | 158 |
| 2009 | 81.96 | 158 |
| 2008 | 81.96 | 158 |
| 2007 | 81.89 | 157 |
| 2006 | 81.84 | 155 |
| 2005 | 81.85 | 154 |
| 2004 | 81.85 | 153 |
| 2003 | 81.95 | 148 |
| 2002 | 82.12 | 146 |
| 2001 | 82.24 | 145 |
| 2000 | 82.23 | 143 |
| 1999 | 82.78 | 141 |
| 1998 | 83.33 | 140 |
| 1997 | 83.91 | 136 |
| 1996 | 84.53 | 135 |
| 1995 | 85.19 | 135 |
| 1994 | 86.16 | 130 |
| 1993 | 87.2 | 130 |
| 1992 | 88.26 | 130 |
| 1991 | 89.25 | 136 |
| 1990 | 90.09 | 139 |
| 1989 | 91.09 | 140 |
| 1988 | 91.96 | 141 |
| 1987 | 92.67 | 145 |
| 1986 | 93.23 | 147 |