| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19.2 | 176 |
| 2015 | 19.14 | 176 |
| 2014 | 19.07 | 176 |
| 2013 | 19.23 | 176 |
| 2012 | 18.84 | 176 |
| 2011 | 17.84 | 179 |
| 2010 | 16.89 | 180 |
| 2009 | 16.77 | 181 |
| 2008 | 16.27 | 182 |
| 2007 | 15.8 | 181 |
| 2006 | 15.37 | 181 |
| 2005 | 14.98 | 183 |
| 2004 | 14.61 | 183 |
| 2003 | 14.29 | 183 |
| 2002 | 13.99 | 183 |
| 2001 | 13.74 | 183 |
| 2000 | 13.52 | 185 |
| 1999 | 13.35 | 185 |
| 1998 | 13.23 | 185 |
| 1997 | 13.14 | 182 |
| 1996 | 13.1 | 181 |
| 1995 | 12.83 | 180 |
| 1994 | 12.56 | 180 |
| 1993 | 12.3 | 180 |
| 1992 | 12.06 | 179 |
| 1991 | 11.85 | 181 |
| 1990 | 11.66 | 182 |