| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 15.84 | 179 |
| 2015 | 14.91 | 181 |
| 2014 | 13.14 | 182 |
| 2013 | 13.24 | 181 |
| 2012 | 15.16 | 179 |
| 2011 | 17.43 | 174 |
| 2010 | 19.75 | 170 |
| 2009 | 18.07 | 177 |
| 2008 | 15.79 | 182 |
| 2007 | 21.95 | 167 |
| 2006 | 22.73 | 166 |
| 2005 | 19.87 | 174 |
| 2004 | 20.3 | 174 |
| 2003 | 19.33 | 176 |
| 2002 | 19.3 | 176 |
| 2001 | 13.42 | 185 |
| 2000 | 17.32 | 183 |
| 1999 | 18.58 | 179 |
| 1998 | 19.14 | 180 |
| 1997 | 19.69 | 179 |
| 1996 | 21.39 | 174 |
| 1995 | 23.07 | 172 |
| 1994 | 24.94 | 166 |
| 1993 | 24 | 165 |
| 1992 | 24.21 | 165 |
| 1991 | 24.47 | 168 |