| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 25.9 | 145 |
| 2015 | 25.99 | 146 |
| 2014 | 26.08 | 145 |
| 2013 | 26.15 | 146 |
| 2012 | 26.21 | 146 |
| 2011 | 26.27 | 148 |
| 2010 | 26.31 | 148 |
| 2009 | 26.36 | 149 |
| 2008 | 26.4 | 149 |
| 2007 | 26.45 | 152 |
| 2006 | 26.49 | 151 |
| 2005 | 26.54 | 151 |
| 2004 | 26.58 | 153 |
| 2003 | 26.63 | 153 |
| 2002 | 26.66 | 155 |
| 2001 | 26.65 | 156 |
| 2000 | 26.65 | 157 |
| 1999 | 26.65 | 156 |
| 1998 | 26.64 | 156 |
| 1997 | 26.64 | 156 |
| 1996 | 26.63 | 156 |
| 1995 | 26.63 | 158 |
| 1994 | 26.62 | 158 |
| 1993 | 26.62 | 160 |
| 1992 | 26.62 | 160 |
| 1991 | 26.61 | 160 |
| 1990 | 26.61 | 163 |
| 1989 | 26.6 | 164 |
| 1988 | 26.82 | 164 |
| 1987 | 27.24 | 164 |
| 1986 | 27.65 | 163 |