| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 13 | 130 |
| 2015 | 12.54 | 155 |
| 2014 | 15.71 | 150 |
| 2013 | 15.76 | 155 |
| 2012 | 16.4 | 149 |
| 2011 | 8.3 | 173 |
| 2010 | 5 | 179 |
| 2009 | 5.01 | 177 |
| 2008 | 7.09 | 176 |
| 2007 | 7.93 | 176 |
| 2006 | 7.7 | 173 |
| 2005 | 7.22 | 174 |
| 2004 | 7.73 | 174 |
| 2003 | 4.15 | 173 |
| 2002 | 3.24 | 172 |
| 2001 | 4.19 | 171 |
| 2000 | 4.25 | 169 |
| 1999 | 7.2 | 163 |
| 1998 | 7.09 | 162 |
| 1997 | 10.24 | 158 |
| 1996 | 1.88 | 161 |
| 1995 | 5.27 | 161 |
| 1994 | 14.07 | 132 |
| 1993 | 15.09 | 123 |
| 1992 | 15.62 | 120 |
| 1991 | 16.75 | 119 |
| 1990 | 16.81 | 113 |
| 1989 | 23.68 | 80 |
| 1988 | 23.87 | 75 |
| 1987 | 23.25 | 74 |
| 1986 | 27.78 | 54 |