| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 20.98 | 148 |
| 2015 | 20.34 | 148 |
| 2014 | 19.49 | 147 |
| 2013 | 18.65 | 145 |
| 2012 | 17.85 | 144 |
| 2011 | 17.1 | 145 |
| 2010 | 16.43 | 143 |
| 2009 | 16.11 | 141 |
| 2008 | 15.86 | 141 |
| 2007 | 15.68 | 140 |
| 2006 | 15.53 | 140 |
| 2005 | 15.39 | 140 |
| 2004 | 15.35 | 141 |
| 2003 | 15.34 | 143 |
| 2002 | 15.37 | 144 |
| 2001 | 15.44 | 144 |
| 2000 | 15.56 | 145 |
| 1999 | 15.7 | 148 |
| 1998 | 15.89 | 149 |
| 1997 | 16.13 | 151 |
| 1996 | 16.41 | 153 |
| 1995 | 16.71 | 155 |
| 1994 | 16.97 | 156 |
| 1993 | 17.26 | 160 |
| 1992 | 17.55 | 166 |
| 1991 | 17.81 | 169 |
| 1990 | 18.02 | 172 |
| 1989 | 18.12 | 170 |
| 1988 | 18.14 | 171 |
| 1987 | 18.1 | 173 |
| 1986 | 18.02 | 173 |