| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.53 | 50 |
| 2015 | 1.6 | 48 |
| 2014 | 1.67 | 42 |
| 2013 | 1.73 | 43 |
| 2012 | 1.81 | 41 |
| 2011 | 1.88 | 42 |
| 2010 | 1.94 | 42 |
| 2009 | 1.99 | 39 |
| 2008 | 2.02 | 41 |
| 2007 | 2.03 | 44 |
| 2006 | 2.03 | 44 |
| 2005 | 2 | 41 |
| 2004 | 2 | 43 |
| 2003 | 2.1 | 40 |
| 2002 | 2.35 | 30 |
| 2001 | 2.32 | 29 |
| 2000 | 2.66 | 22 |
| 1999 | 2.99 | 15 |
| 1998 | 3.23 | 12 |
| 1997 | 3.31 | 14 |
| 1996 | 3.25 | 12 |
| 1995 | 3.18 | 14 |
| 1994 | 3.09 | 16 |
| 1993 | 2.76 | 27 |
| 1992 | 2.24 | 45 |
| 1991 | 0.85 | 100 |
| 1990 | -.02 | 146 |
| 1989 | -.77 | 168 |
| 1988 | -1.29 | 179 |
| 1987 | -1.54 | 185 |
| 1986 | -1.53 | 184 |