| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 31.6 | 188 |
| 2015 | 31.06 | 188 |
| 2014 | 30.51 | 188 |
| 2013 | 29.84 | 189 |
| 2012 | 29.13 | 189 |
| 2011 | 28.47 | 190 |
| 2010 | 27.91 | 190 |
| 2009 | 27.47 | 190 |
| 2008 | 27.13 | 191 |
| 2007 | 26.86 | 190 |
| 2006 | 26.66 | 190 |
| 2005 | 26.51 | 190 |
| 2004 | 26.45 | 191 |
| 2003 | 26.5 | 191 |
| 2002 | 26.63 | 192 |
| 2001 | 26.78 | 193 |
| 2000 | 26.92 | 194 |
| 1999 | 27.08 | 194 |
| 1998 | 27.22 | 194 |
| 1997 | 27.35 | 194 |
| 1996 | 27.45 | 194 |
| 1995 | 27.51 | 194 |
| 1994 | 27.65 | 193 |
| 1993 | 27.76 | 193 |
| 1992 | 27.83 | 193 |
| 1991 | 27.82 | 194 |
| 1990 | 27.74 | 194 |
| 1989 | 27.65 | 192 |
| 1988 | 27.48 | 192 |
| 1987 | 27.25 | 192 |
| 1986 | 27 | 192 |