| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 13.19 | 150 |
| 2015 | 13.49 | 152 |
| 2014 | 13.94 | 153 |
| 2013 | 13.97 | 148 |
| 2012 | 14.1 | 151 |
| 2011 | 14.04 | 151 |
| 2010 | 14.51 | 157 |
| 2009 | 14.97 | 159 |
| 2008 | 15.87 | 166 |
| 2007 | 16.8 | 167 |
| 2006 | 15.67 | 160 |
| 2005 | 14.23 | 154 |
| 2004 | 12.82 | 146 |
| 2003 | 11.49 | 132 |
| 2002 | 10.25 | 119 |
| 2001 | 9.11 | 108 |
| 2000 | 8.07 | 98 |
| 1999 | 7.2 | 82 |
| 1998 | 12.37 | 136 |
| 1997 | 12.39 | 137 |
| 1996 | 12.38 | 134 |
| 1995 | 12.21 | 139 |
| 1994 | 13.18 | 139 |
| 1993 | 12.98 | 138 |
| 1992 | 12.97 | 138 |
| 1991 | 12.94 | 141 |