| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 27.56 | 112 |
| 2015 | 22.42 | 138 |
| 2014 | 21.85 | 137 |
| 2013 | 20.93 | 142 |
| 2012 | 20.3 | 144 |
| 2011 | 21.88 | 143 |
| 2010 | 21.31 | 146 |
| 2009 | 19.84 | 148 |
| 2008 | 19.38 | 150 |
| 2007 | 18.14 | 156 |
| 2006 | 16.47 | 155 |
| 2005 | 16.34 | 151 |
| 2004 | 16.24 | 147 |
| 2003 | 15.91 | 146 |
| 2002 | 16.29 | 143 |
| 2001 | 14.44 | 146 |
| 2000 | 15.21 | 146 |
| 1999 | 13.68 | 144 |
| 1998 | 12.85 | 145 |
| 1997 | 12.98 | 145 |
| 1996 | 11.94 | 143 |
| 1995 | 14.32 | 139 |
| 1994 | 17.26 | 125 |
| 1993 | 15.21 | 130 |
| 1992 | 18.83 | 117 |
| 1991 | 21.63 | 102 |
| 1990 | 21.23 | 101 |
| 1989 | 20.41 | 97 |
| 1988 | 19.2 | 103 |
| 1987 | 17.49 | 107 |
| 1986 | 20.45 | 96 |