| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 11.45 | 143 |
| 2015 | 8.52 | 113 |
| 2014 | 6.81 | 92 |
| 2013 | 7.13 | 96 |
| 2012 | 7.35 | 96 |
| 2011 | 7.78 | 101 |
| 2010 | 8.49 | 110 |
| 2009 | 9.73 | 130 |
| 2008 | 9.57 | 137 |
| 2007 | 10.86 | 143 |
| 2006 | 11.49 | 145 |
| 2005 | 11.37 | 142 |
| 2004 | 12.87 | 147 |
| 2003 | 13.68 | 147 |
| 2002 | 13.04 | 143 |
| 2001 | 12.54 | 139 |
| 2000 | 13.98 | 146 |
| 1999 | 14.67 | 157 |
| 1998 | 14.74 | 158 |
| 1997 | 11.58 | 128 |
| 1996 | 11.2 | 123 |
| 1995 | 9.91 | 120 |
| 1994 | 10.6 | 123 |
| 1993 | 10.99 | 125 |
| 1992 | 11.58 | 129 |
| 1991 | 10.21 | 123 |