| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 11 | 135 |
| 2015 | 11.29 | 140 |
| 2014 | 11.81 | 140 |
| 2013 | 11.89 | 140 |
| 2012 | 11.96 | 137 |
| 2011 | 12.07 | 136 |
| 2010 | 12.18 | 142 |
| 2009 | 12.17 | 144 |
| 2008 | 11.24 | 147 |
| 2007 | 11.07 | 146 |
| 2006 | 10.89 | 140 |
| 2005 | 10.72 | 131 |
| 2004 | 10.56 | 129 |
| 2003 | 10.39 | 120 |
| 2002 | 9.77 | 113 |
| 2001 | 9.19 | 113 |
| 2000 | 8.63 | 101 |
| 1999 | 8.1 | 96 |
| 1998 | 10.73 | 120 |
| 1997 | 10.35 | 118 |
| 1996 | 9.99 | 114 |
| 1995 | 9.63 | 117 |
| 1994 | 9.3 | 113 |
| 1993 | 10.39 | 120 |
| 1992 | 10.41 | 122 |
| 1991 | 10.49 | 126 |