| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 18.8 | 169 |
| 2015 | 18.5 | 171 |
| 2014 | 18.87 | 167 |
| 2013 | 17.61 | 170 |
| 2012 | 17.94 | 171 |
| 2011 | 13.11 | 182 |
| 2010 | 13.69 | 181 |
| 2009 | 18.88 | 174 |
| 2008 | 23.82 | 159 |
| 2007 | 20.48 | 173 |
| 2006 | 20.21 | 173 |
| 2005 | 21.28 | 168 |
| 2004 | 21.27 | 170 |
| 2003 | 19.84 | 174 |
| 2002 | 20.69 | 172 |
| 2001 | 20.58 | 173 |
| 2000 | 20.92 | 170 |
| 1999 | 21.6 | 172 |
| 1998 | 19.87 | 179 |
| 1997 | 20.62 | 175 |
| 1996 | 21.82 | 173 |
| 1995 | 23.8 | 169 |
| 1994 | 23.61 | 171 |
| 1993 | 23.58 | 168 |
| 1992 | 23.39 | 171 |
| 1991 | 22.78 | 173 |