| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 11.19 | 138 |
| 2015 | 10.62 | 134 |
| 2014 | 10.06 | 126 |
| 2013 | 9.98 | 124 |
| 2012 | 10 | 122 |
| 2011 | 13.07 | 143 |
| 2010 | 14.59 | 158 |
| 2009 | 16.1 | 166 |
| 2008 | 12.72 | 155 |
| 2007 | 13.29 | 157 |
| 2006 | 13.88 | 155 |
| 2005 | 15.85 | 157 |
| 2004 | 12.64 | 145 |
| 2003 | 11.93 | 139 |
| 2002 | 11.24 | 127 |
| 2001 | 10.24 | 120 |
| 2000 | 16.03 | 161 |
| 1999 | 13.12 | 139 |
| 1998 | 10.66 | 119 |
| 1997 | 10.72 | 124 |
| 1996 | 10.78 | 119 |
| 1995 | 10.35 | 124 |
| 1994 | 12.41 | 133 |
| 1993 | 12.49 | 135 |
| 1992 | 12.55 | 136 |
| 1991 | 12.52 | 140 |