| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 52.435 | 98 |
| 2015 | 51.555 | 127 |
| 2014 | 50.741 | 128 |
| 2013 | 49.225 | 136 |
| 2012 | 47.987 | 139 |
| 2011 | 46.255 | 144 |
| 2010 | 47.837 | 140 |
| 2009 | 49.594 | 130 |
| 2008 | 49.937 | 121 |
| 2007 | 49.346 | 125 |
| 2006 | 48.16 | 122 |
| 2005 | 45.955 | 130 |
| 2004 | 44.97 | 129 |
| 2003 | 44.313 | 133 |
| 2002 | 43.32 | 136 |
| 2001 | 44.564 | 133 |
| 2000 | 37.048 | 149 |
| 1999 | 36.899 | 147 |
| 1998 | 37.602 | 142 |
| 1997 | 35.704 | 143 |
| 1996 | 35.579 | 139 |
| 1995 | 35.487 | 137 |
| 1994 | 35.217 | 121 |
| 1993 | 37.11 | 111 |
| 1992 | 34.737 | 112 |
| 1991 | 35.422 | 109 |
| 1990 | 32.131 | 112 |
| 1989 | 33.089 | 94 |
| 1988 | 32.934 | 95 |
| 1987 | 33.449 | 95 |
| 1986 | 32.671 | 97 |