| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 24.16 | 166 |
| 2015 | 25.53 | 175 |
| 2014 | 30.65 | 174 |
| 2013 | 32.99 | 173 |
| 2012 | 35.3 | 172 |
| 2011 | 37.89 | 172 |
| 2010 | 36.26 | 167 |
| 2009 | 35.99 | 162 |
| 2008 | 45.82 | 152 |
| 2007 | 43.17 | 155 |
| 2006 | 40.96 | 160 |
| 2005 | 39.43 | 161 |
| 2004 | 32.48 | 171 |
| 2003 | 24.55 | 181 |
| 2002 | 20.85 | 181 |
| 2001 | 18.64 | 184 |
| 2000 | 19.89 | 181 |
| 1999 | 21.59 | 176 |
| 1998 | 22.75 | 173 |
| 1997 | 21.84 | 173 |
| 1996 | 24.51 | 171 |
| 1995 | 25.28 | 170 |
| 1994 | 26.39 | 163 |
| 1993 | 24.3 | 144 |
| 1992 | 27.21 | 137 |
| 1991 | 31.8 | 120 |
| 1990 | 36.84 | 107 |
| 1989 | 51.26 | 69 |
| 1988 | 82.76 | 25 |
| 1987 | 50.79 | 66 |
| 1986 | 40.23 | 89 |