| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.11 | 158 |
| 2015 | 3.11 | 154 |
| 2014 | 3.11 | 154 |
| 2013 | 3.11 | 156 |
| 2012 | 3.1 | 157 |
| 2011 | 3.09 | 160 |
| 2010 | 3.08 | 160 |
| 2009 | 3.06 | 162 |
| 2008 | 3.03 | 163 |
| 2007 | 3.01 | 163 |
| 2006 | 2.98 | 164 |
| 2005 | 2.95 | 166 |
| 2004 | 2.93 | 167 |
| 2003 | 2.91 | 168 |
| 2002 | 2.88 | 169 |
| 2001 | 2.85 | 170 |
| 2000 | 2.82 | 174 |
| 1999 | 2.82 | 175 |
| 1998 | 2.81 | 175 |
| 1997 | 2.79 | 174 |
| 1996 | 2.77 | 173 |
| 1995 | 2.75 | 175 |
| 1994 | 2.75 | 175 |
| 1993 | 2.74 | 175 |
| 1992 | 2.73 | 174 |
| 1991 | 2.72 | 175 |
| 1990 | 2.71 | 174 |
| 1989 | 2.71 | 174 |
| 1988 | 2.7 | 174 |
| 1987 | 2.69 | 174 |
| 1986 | 2.68 | 174 |