| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 83.68 | 170 |
| 2015 | 84.18 | 170 |
| 2014 | 84.88 | 171 |
| 2013 | 85.6 | 169 |
| 2012 | 86.29 | 170 |
| 2011 | 86.87 | 171 |
| 2010 | 87.27 | 172 |
| 2009 | 87.96 | 173 |
| 2008 | 88.54 | 172 |
| 2007 | 89.01 | 171 |
| 2006 | 89.35 | 170 |
| 2005 | 89.5 | 170 |
| 2004 | 90.1 | 170 |
| 2003 | 90.6 | 170 |
| 2002 | 90.95 | 170 |
| 2001 | 91.11 | 168 |
| 2000 | 91.03 | 164 |
| 1999 | 91.57 | 163 |
| 1998 | 91.93 | 164 |
| 1997 | 92.01 | 162 |
| 1996 | 91.77 | 159 |
| 1995 | 91.24 | 156 |
| 1994 | 91.57 | 155 |
| 1993 | 91.43 | 152 |
| 1992 | 91.01 | 146 |
| 1991 | 90.43 | 141 |
| 1990 | 89.62 | 138 |
| 1989 | 89.01 | 132 |
| 1988 | 88.52 | 129 |
| 1987 | 87.96 | 128 |
| 1986 | 87.16 | 125 |