| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.01 | 154 |
| 2015 | 70.47 | 153 |
| 2014 | 71.08 | 153 |
| 2013 | 71.65 | 153 |
| 2012 | 72.21 | 153 |
| 2011 | 72.76 | 153 |
| 2010 | 73.29 | 153 |
| 2009 | 74.03 | 153 |
| 2008 | 74.79 | 154 |
| 2007 | 75.57 | 155 |
| 2006 | 76.39 | 157 |
| 2005 | 77.23 | 158 |
| 2004 | 78.35 | 159 |
| 2003 | 79.54 | 159 |
| 2002 | 80.76 | 158 |
| 2001 | 81.93 | 160 |
| 2000 | 82.99 | 161 |
| 1999 | 84.3 | 162 |
| 1998 | 85.52 | 164 |
| 1997 | 86.61 | 164 |
| 1996 | 87.57 | 166 |
| 1995 | 88.38 | 169 |
| 1994 | 89.19 | 168 |
| 1993 | 89.79 | 167 |
| 1992 | 90.15 | 168 |
| 1991 | 90.31 | 167 |
| 1990 | 90.25 | 165 |
| 1989 | 90.26 | 159 |
| 1988 | 90.14 | 157 |
| 1987 | 89.87 | 155 |
| 1986 | 89.39 | 154 |