| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 27.02 | 141 |
| 2015 | 27.01 | 141 |
| 2014 | 26.98 | 142 |
| 2013 | 26.94 | 142 |
| 2012 | 26.89 | 144 |
| 2011 | 26.82 | 146 |
| 2010 | 26.75 | 146 |
| 2009 | 26.68 | 147 |
| 2008 | 26.61 | 147 |
| 2007 | 26.54 | 148 |
| 2006 | 26.47 | 153 |
| 2005 | 26.4 | 155 |
| 2004 | 26.33 | 155 |
| 2003 | 26.26 | 156 |
| 2002 | 26.19 | 157 |
| 2001 | 26.12 | 158 |
| 2000 | 26.01 | 158 |
| 1999 | 25.88 | 158 |
| 1998 | 25.75 | 159 |
| 1997 | 25.62 | 160 |
| 1996 | 25.49 | 162 |
| 1995 | 25.36 | 162 |
| 1994 | 25.23 | 164 |
| 1993 | 25.1 | 164 |
| 1992 | 24.97 | 164 |
| 1991 | 24.84 | 167 |
| 1990 | 24.78 | 168 |
| 1989 | 24.75 | 168 |
| 1988 | 24.72 | 169 |
| 1987 | 24.69 | 169 |
| 1986 | 24.66 | 170 |