| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 18.3 | 170 |
| 2015 | 20.51 | 179 |
| 2014 | 18.9 | 185 |
| 2013 | 19.92 | 187 |
| 2012 | 19.31 | 187 |
| 2011 | 18.84 | 190 |
| 2010 | 17.81 | 190 |
| 2009 | 17.2 | 191 |
| 2008 | 22.43 | 190 |
| 2007 | 20.56 | 191 |
| 2006 | 21.09 | 191 |
| 2005 | 22 | 188 |
| 2004 | 24.37 | 186 |
| 2003 | 22.2 | 182 |
| 2002 | 21.67 | 180 |
| 2001 | 20.89 | 178 |
| 2000 | 17.41 | 185 |
| 1999 | 16.67 | 184 |
| 1998 | 13 | 185 |
| 1997 | 13.17 | 182 |
| 1996 | 12.29 | 183 |
| 1995 | 12.81 | 183 |
| 1994 | 14.25 | 174 |
| 1993 | 15.14 | 158 |
| 1992 | 14.69 | 157 |
| 1991 | 9.05 | 155 |
| 1990 | 11.68 | 151 |
| 1989 | 12.75 | 148 |
| 1988 | 15 | 144 |
| 1987 | 14.56 | 143 |
| 1986 | 14.14 | 139 |