| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 30.82 | 159 |
| 2015 | 30.77 | 158 |
| 2014 | 30.72 | 158 |
| 2013 | 30.47 | 158 |
| 2012 | 30.2 | 158 |
| 2011 | 30.07 | 160 |
| 2010 | 30.03 | 159 |
| 2009 | 29.91 | 159 |
| 2008 | 29.87 | 160 |
| 2007 | 29.89 | 160 |
| 2006 | 29.95 | 159 |
| 2005 | 30 | 160 |
| 2004 | 30.02 | 160 |
| 2003 | 30.2 | 160 |
| 2002 | 30.19 | 159 |
| 2001 | 30.28 | 158 |
| 2000 | 30.49 | 160 |
| 1999 | 30.61 | 156 |
| 1998 | 30.82 | 153 |
| 1997 | 31.2 | 151 |
| 1996 | 31.55 | 149 |
| 1995 | 31.84 | 147 |
| 1994 | 32.1 | 144 |
| 1993 | 32.15 | 141 |
| 1992 | 32.39 | 139 |
| 1991 | 32.85 | 137 |