| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 45.73 | 86 |
| 2015 | 45.33 | 98 |
| 2014 | 40.44 | 105 |
| 2013 | 39.2 | 101 |
| 2012 | 39.97 | 98 |
| 2011 | 36.3 | 111 |
| 2010 | 34.89 | 116 |
| 2009 | 31.01 | 124 |
| 2008 | 28.91 | 123 |
| 2007 | 27.4 | 127 |
| 2006 | 26.1 | 122 |
| 2005 | 24.55 | 124 |
| 2004 | 23.66 | 123 |
| 2003 | 25.67 | 117 |
| 2002 | 28.14 | 108 |
| 2001 | 26.96 | 109 |
| 2000 | 19.67 | 126 |
| 1999 | 18.19 | 125 |
| 1998 | 16.55 | 132 |
| 1997 | 19.79 | 122 |
| 1996 | 21.7 | 111 |
| 1995 | 20.14 | 114 |
| 1994 | 24.08 | 105 |
| 1993 | 23.26 | 105 |
| 1992 | 23.83 | 102 |
| 1991 | 22.91 | 99 |
| 1990 | 22.75 | 91 |
| 1989 | 23.52 | 90 |
| 1988 | 20.5 | 98 |
| 1987 | 18.58 | 104 |
| 1986 | 15.44 | 110 |