| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19.16 | 108 |
| 2015 | 19.96 | 126 |
| 2014 | 20.98 | 120 |
| 2013 | 21.05 | 124 |
| 2012 | 22.05 | 119 |
| 2011 | 21.23 | 125 |
| 2010 | 20.58 | 127 |
| 2009 | 20.2 | 127 |
| 2008 | 22.33 | 120 |
| 2007 | 21.13 | 128 |
| 2006 | 20.95 | 130 |
| 2005 | 27.1 | 90 |
| 2004 | 26.99 | 89 |
| 2003 | 23.91 | 111 |
| 2002 | 23.86 | 114 |
| 2001 | 24.02 | 112 |
| 2000 | 23.33 | 110 |
| 1999 | 23.74 | 110 |
| 1998 | 23.8 | 111 |
| 1997 | 23.51 | 111 |
| 1996 | 24.16 | 107 |
| 1995 | 23.8 | 109 |
| 1994 | 24.26 | 93 |
| 1993 | 24.72 | 90 |
| 1992 | 25.02 | 87 |
| 1991 | 25.45 | 87 |
| 1990 | 25.19 | 84 |
| 1989 | 23.89 | 78 |
| 1988 | 24.38 | 71 |
| 1987 | 24.02 | 72 |
| 1986 | 23.35 | 70 |