| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.04 | 118 |
| 2015 | 16.43 | 140 |
| 2014 | 16.64 | 145 |
| 2013 | 16.9 | 149 |
| 2012 | 13.8 | 161 |
| 2011 | 13.88 | 162 |
| 2010 | 13.81 | 163 |
| 2009 | 13.7 | 161 |
| 2008 | 13.37 | 167 |
| 2007 | 14.38 | 162 |
| 2006 | 14.26 | 161 |
| 2005 | 14.27 | 162 |
| 2004 | 14.11 | 162 |
| 2003 | 13.7 | 162 |
| 2002 | 13.98 | 158 |
| 2001 | 14.33 | 156 |
| 2000 | 14.63 | 155 |
| 1999 | 14.43 | 152 |
| 1998 | 14.44 | 150 |
| 1997 | 14.6 | 147 |
| 1996 | 16.68 | 135 |
| 1995 | 21.23 | 122 |
| 1994 | 22.06 | 102 |
| 1993 | 21.9 | 100 |
| 1992 | 21.07 | 98 |
| 1991 | 21.26 | 100 |
| 1990 | 20.36 | 99 |
| 1989 | 19.39 | 90 |
| 1988 | 16.98 | 90 |
| 1987 | 15.51 | 98 |
| 1986 | 13.56 | 97 |