| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 28.44 | 133 |
| 2015 | 28.82 | 128 |
| 2014 | 29.48 | 126 |
| 2013 | 30.6 | 122 |
| 2012 | 30.91 | 124 |
| 2011 | 29.88 | 129 |
| 2010 | 30.45 | 126 |
| 2009 | 27.66 | 136 |
| 2008 | 26.46 | 145 |
| 2007 | 30.52 | 136 |
| 2006 | 25.67 | 150 |
| 2005 | 25.85 | 146 |
| 2004 | 26.51 | 151 |
| 2003 | 27.17 | 149 |
| 2002 | 27.28 | 149 |
| 2001 | 29.57 | 143 |
| 2000 | 31.11 | 141 |
| 1999 | 28.95 | 147 |
| 1998 | 28.86 | 150 |
| 1997 | 37.23 | 113 |
| 1996 | 36.94 | 113 |
| 1995 | 33.94 | 137 |
| 1994 | 30.51 | 149 |
| 1993 | 38.59 | 113 |
| 1992 | 36.28 | 129 |
| 1991 | 40.15 | 112 |