| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 20.76 | 169 |
| 2015 | 19.93 | 181 |
| 2014 | 25.39 | 180 |
| 2013 | 27.25 | 180 |
| 2012 | 27.1 | 181 |
| 2011 | 29.87 | 183 |
| 2010 | 29.5 | 180 |
| 2009 | 28.37 | 180 |
| 2008 | 35.26 | 176 |
| 2007 | 34.95 | 175 |
| 2006 | 34.7 | 175 |
| 2005 | 34.74 | 168 |
| 2004 | 34.63 | 165 |
| 2003 | 34.02 | 161 |
| 2002 | 35.45 | 152 |
| 2001 | 17.44 | 187 |
| 2000 | 18.12 | 183 |
| 1999 | 17.23 | 182 |
| 1998 | 19.35 | 179 |
| 1997 | 19.4 | 177 |
| 1996 | 17.48 | 181 |
| 1995 | 15.92 | 179 |
| 1994 | 14.44 | 173 |
| 1993 | 12.63 | 160 |
| 1992 | 11.85 | 159 |
| 1991 | 10.68 | 153 |
| 1990 | 11.62 | 152 |
| 1989 | 17.98 | 142 |
| 1988 | 11.46 | 149 |
| 1987 | 10.96 | 146 |
| 1986 | 10.43 | 144 |