| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 18.36 | 171 |
| 2015 | 18.52 | 169 |
| 2014 | 18.84 | 168 |
| 2013 | 19.39 | 165 |
| 2012 | 19.83 | 164 |
| 2011 | 21.75 | 160 |
| 2010 | 21.27 | 166 |
| 2009 | 21.26 | 168 |
| 2008 | 21.1 | 169 |
| 2007 | 20.91 | 171 |
| 2006 | 20.77 | 172 |
| 2005 | 20.61 | 172 |
| 2004 | 20.57 | 172 |
| 2003 | 20.4 | 171 |
| 2002 | 20.46 | 173 |
| 2001 | 20.38 | 174 |
| 2000 | 20.22 | 176 |
| 1999 | 20.12 | 176 |
| 1998 | 19.97 | 177 |
| 1997 | 19.78 | 178 |
| 1996 | 19.55 | 179 |
| 1995 | 19.47 | 182 |
| 1994 | 19.17 | 182 |
| 1993 | 19.06 | 182 |
| 1992 | 18.9 | 182 |
| 1991 | 17.57 | 186 |