| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 30.47 | 108 |
| 2015 | 25.04 | 134 |
| 2014 | 23.9 | 134 |
| 2013 | 25.35 | 134 |
| 2012 | 24.47 | 135 |
| 2011 | 25.08 | 136 |
| 2010 | 25.61 | 135 |
| 2009 | 25.42 | 135 |
| 2008 | 22.35 | 145 |
| 2007 | 21.57 | 143 |
| 2006 | 19.47 | 146 |
| 2005 | 17.17 | 146 |
| 2004 | 17.67 | 143 |
| 2003 | 17.78 | 139 |
| 2002 | 17.11 | 141 |
| 2001 | 17.17 | 137 |
| 2000 | 17.23 | 136 |
| 1999 | 23.53 | 107 |
| 1998 | 22.08 | 110 |
| 1997 | 21.55 | 116 |
| 1996 | 20.72 | 113 |
| 1995 | 19.92 | 115 |
| 1994 | 23.45 | 107 |
| 1993 | 24.03 | 103 |
| 1992 | 25.61 | 96 |
| 1991 | 24.25 | 93 |
| 1990 | 22.36 | 95 |
| 1989 | 35.06 | 61 |
| 1988 | 32.42 | 65 |
| 1987 | 31.26 | 66 |
| 1986 | 31.75 | 63 |