| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 80.14 | 175 |
| 2015 | 81.14 | 175 |
| 2014 | 82.08 | 175 |
| 2013 | 82.79 | 176 |
| 2012 | 83.35 | 177 |
| 2011 | 83.87 | 179 |
| 2010 | 84.51 | 178 |
| 2009 | 84.71 | 178 |
| 2008 | 84.87 | 178 |
| 2007 | 85.03 | 177 |
| 2006 | 85.28 | 175 |
| 2005 | 85.64 | 175 |
| 2004 | 86.16 | 175 |
| 2003 | 87.05 | 176 |
| 2002 | 88.18 | 177 |
| 2001 | 89.15 | 178 |
| 2000 | 89.53 | 178 |
| 1999 | 90.26 | 178 |
| 1998 | 90.54 | 178 |
| 1997 | 90.61 | 178 |
| 1996 | 91.1 | 177 |
| 1995 | 92.44 | 181 |
| 1994 | 93.69 | 179 |
| 1993 | 95.72 | 183 |
| 1992 | 98.23 | 186 |
| 1991 | 100.19 | 193 |
| 1990 | 100.81 | 191 |
| 1989 | 101.62 | 189 |
| 1988 | 101.12 | 189 |
| 1987 | 99.81 | 189 |
| 1986 | 99.05 | 187 |