| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 55.841 | 83 |
| 2015 | 54.888 | 113 |
| 2014 | 52.982 | 116 |
| 2013 | 51.695 | 122 |
| 2012 | 51.065 | 127 |
| 2011 | 50.333 | 127 |
| 2010 | 49.462 | 135 |
| 2009 | 51.502 | 123 |
| 2008 | 50.339 | 119 |
| 2007 | 51.103 | 118 |
| 2006 | 51.324 | 114 |
| 2005 | 52.173 | 116 |
| 2004 | 52.678 | 114 |
| 2003 | 52.497 | 113 |
| 2002 | 54.259 | 104 |
| 2001 | 54.95 | 100 |
| 2000 | 54.658 | 98 |
| 1999 | 54.556 | 91 |
| 1998 | 53.453 | 91 |
| 1997 | 54.15 | 88 |
| 1996 | 53.613 | 84 |
| 1995 | 53.391 | 85 |
| 1994 | 54.148 | 60 |
| 1993 | 54.893 | 53 |
| 1992 | 49.647 | 70 |
| 1991 | 48.692 | 69 |
| 1990 | 50.276 | 60 |
| 1989 | 48.673 | 59 |
| 1988 | 49.242 | 55 |
| 1987 | 50.923 | 49 |
| 1986 | 51.253 | 49 |