| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 21.22 | 171 |
| 2015 | 20.96 | 171 |
| 2014 | 20.58 | 172 |
| 2013 | 20.63 | 171 |
| 2012 | 20.7 | 172 |
| 2011 | 21.67 | 171 |
| 2010 | 21.44 | 171 |
| 2009 | 23.56 | 168 |
| 2008 | 25.06 | 166 |
| 2007 | 23.61 | 168 |
| 2006 | 26.91 | 162 |
| 2005 | 26.6 | 163 |
| 2004 | 28.4 | 162 |
| 2003 | 28.64 | 162 |
| 2002 | 28.75 | 162 |
| 2001 | 29.89 | 160 |
| 2000 | 30.66 | 159 |
| 1999 | 29.89 | 158 |
| 1998 | 30.64 | 154 |
| 1997 | 31.36 | 150 |
| 1996 | 34.02 | 138 |
| 1995 | 34.59 | 132 |
| 1994 | 35.4 | 127 |
| 1993 | 37.73 | 120 |
| 1992 | 38.04 | 117 |
| 1991 | 39.36 | 114 |