| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 29.29 | 157 |
| 2015 | 34.04 | 161 |
| 2014 | 38.15 | 164 |
| 2013 | 34.21 | 170 |
| 2012 | 34.18 | 173 |
| 2011 | 36.84 | 175 |
| 2010 | 36.52 | 166 |
| 2009 | 28.63 | 179 |
| 2008 | 36.5 | 173 |
| 2007 | 35.95 | 171 |
| 2006 | 40.9 | 161 |
| 2005 | 40.3 | 159 |
| 2004 | 35.06 | 164 |
| 2003 | 36.9 | 154 |
| 2002 | 26.41 | 173 |
| 2001 | 27.53 | 168 |
| 2000 | 21.19 | 179 |
| 1999 | 26.04 | 169 |
| 1998 | 26.57 | 165 |
| 1997 | 19.79 | 176 |
| 1996 | 21.27 | 176 |
| 1995 | 20.45 | 174 |
| 1994 | 20.28 | 168 |
| 1993 | 11.17 | 162 |
| 1992 | 9.61 | 160 |
| 1991 | 4.91 | 156 |
| 1990 | 11.33 | 153 |
| 1989 | 12.27 | 150 |
| 1988 | 14.28 | 148 |
| 1987 | 13.5 | 145 |
| 1986 | 15.81 | 137 |