| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 8.11 | 191 |
| 2015 | 8.25 | 191 |
| 2014 | 8.4 | 190 |
| 2013 | 8.55 | 190 |
| 2012 | 8.71 | 191 |
| 2011 | 8.87 | 192 |
| 2010 | 9.03 | 193 |
| 2009 | 9.21 | 193 |
| 2008 | 9.38 | 193 |
| 2007 | 9.56 | 193 |
| 2006 | 9.73 | 192 |
| 2005 | 9.92 | 191 |
| 2004 | 10.1 | 191 |
| 2003 | 10.29 | 191 |
| 2002 | 10.48 | 191 |
| 2001 | 10.67 | 191 |
| 2000 | 10.86 | 191 |
| 1999 | 11.05 | 191 |
| 1998 | 11.24 | 191 |
| 1997 | 11.44 | 191 |
| 1996 | 11.63 | 191 |
| 1995 | 11.84 | 191 |
| 1994 | 12.04 | 191 |
| 1993 | 12.25 | 191 |
| 1992 | 12.46 | 191 |
| 1991 | 12.67 | 191 |
| 1990 | 13.02 | 191 |
| 1989 | 13.39 | 189 |
| 1988 | 13.77 | 189 |
| 1987 | 14.16 | 190 |
| 1986 | 14.56 | 190 |