| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 20.01 | 144 |
| 2015 | 19.36 | 144 |
| 2014 | 18.97 | 144 |
| 2013 | 18.68 | 146 |
| 2012 | 18.45 | 147 |
| 2011 | 18.27 | 149 |
| 2010 | 18.17 | 150 |
| 2009 | 18.32 | 151 |
| 2008 | 18.64 | 153 |
| 2007 | 19.06 | 157 |
| 2006 | 19.38 | 159 |
| 2005 | 19.46 | 159 |
| 2004 | 19.55 | 162 |
| 2003 | 19.29 | 162 |
| 2002 | 18.8 | 162 |
| 2001 | 18.31 | 159 |
| 2000 | 17.95 | 157 |
| 1999 | 17.93 | 158 |
| 1998 | 18.08 | 159 |
| 1997 | 18.3 | 161 |
| 1996 | 18.4 | 164 |
| 1995 | 18.25 | 165 |
| 1994 | 17.94 | 164 |
| 1993 | 17.39 | 162 |
| 1992 | 16.69 | 158 |
| 1991 | 15.99 | 157 |
| 1990 | 15.43 | 156 |
| 1989 | 15.04 | 150 |
| 1988 | 14.8 | 151 |
| 1987 | 14.68 | 151 |
| 1986 | 14.62 | 153 |