| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 15.44 | 180 |
| 2015 | 15.13 | 180 |
| 2014 | 14.06 | 180 |
| 2013 | 12.63 | 184 |
| 2012 | 13.6 | 180 |
| 2011 | 16.91 | 176 |
| 2010 | 20.97 | 167 |
| 2009 | 23.73 | 156 |
| 2008 | 24.55 | 155 |
| 2007 | 25.25 | 152 |
| 2006 | 25.39 | 152 |
| 2005 | 25.58 | 151 |
| 2004 | 27.74 | 146 |
| 2003 | 26.53 | 153 |
| 2002 | 27.63 | 146 |
| 2001 | 26.99 | 156 |
| 2000 | 28.72 | 150 |
| 1999 | 28.63 | 151 |
| 1998 | 29.58 | 147 |
| 1997 | 26.74 | 154 |
| 1996 | 27.66 | 150 |
| 1995 | 28.51 | 149 |
| 1994 | 28.29 | 151 |
| 1993 | 29.64 | 151 |
| 1992 | 30.33 | 154 |
| 1991 | 30.93 | 152 |