| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 8.35 | 213 |
| 2015 | 8.45 | 213 |
| 2014 | 8.55 | 210 |
| 2013 | 8.67 | 210 |
| 2012 | 8.8 | 210 |
| 2011 | 8.94 | 211 |
| 2010 | 9.09 | 211 |
| 2009 | 9.25 | 211 |
| 2008 | 9.41 | 211 |
| 2007 | 9.57 | 211 |
| 2006 | 9.74 | 210 |
| 2005 | 9.9 | 210 |
| 2004 | 10.07 | 210 |
| 2003 | 10.24 | 210 |
| 2002 | 10.42 | 210 |
| 2001 | 10.6 | 210 |
| 2000 | 10.78 | 210 |
| 1999 | 10.58 | 210 |
| 1998 | 10.33 | 210 |
| 1997 | 10.09 | 210 |
| 1996 | 9.85 | 210 |
| 1995 | 9.62 | 210 |
| 1994 | 9.4 | 209 |
| 1993 | 9.17 | 209 |
| 1992 | 8.96 | 209 |
| 1991 | 8.74 | 209 |
| 1990 | 8.53 | 209 |
| 1989 | 8.68 | 206 |
| 1988 | 8.9 | 206 |
| 1987 | 9.13 | 206 |
| 1986 | 9.36 | 206 |