| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 17.31 | 137 |
| 2015 | 17.11 | 137 |
| 2014 | 16.93 | 138 |
| 2013 | 16.77 | 139 |
| 2012 | 16.61 | 139 |
| 2011 | 16.46 | 141 |
| 2010 | 16.33 | 142 |
| 2009 | 16.25 | 143 |
| 2008 | 16.19 | 142 |
| 2007 | 16.14 | 142 |
| 2006 | 16.1 | 142 |
| 2005 | 16.06 | 145 |
| 2004 | 16.05 | 145 |
| 2003 | 16.05 | 145 |
| 2002 | 16.04 | 146 |
| 2001 | 16.01 | 146 |
| 2000 | 15.96 | 148 |
| 1999 | 15.93 | 149 |
| 1998 | 15.87 | 148 |
| 1997 | 15.79 | 149 |
| 1996 | 15.69 | 149 |
| 1995 | 15.57 | 149 |
| 1994 | 15.5 | 148 |
| 1993 | 15.42 | 149 |
| 1992 | 15.31 | 148 |
| 1991 | 15.17 | 151 |
| 1990 | 15.01 | 151 |
| 1989 | 14.89 | 149 |
| 1988 | 14.75 | 148 |
| 1987 | 14.59 | 150 |
| 1986 | 14.42 | 150 |