| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.39 | 80 |
| 2015 | 2.56 | 75 |
| 2014 | 2.73 | 67 |
| 2013 | 2.86 | 66 |
| 2012 | 2.95 | 67 |
| 2011 | 3 | 67 |
| 2010 | 3.01 | 67 |
| 2009 | 3.03 | 65 |
| 2008 | 3.06 | 66 |
| 2007 | 3.12 | 65 |
| 2006 | 3.2 | 64 |
| 2005 | 3.27 | 64 |
| 2004 | 3.35 | 59 |
| 2003 | 3.44 | 55 |
| 2002 | 3.56 | 51 |
| 2001 | 3.7 | 48 |
| 2000 | 4.32 | 23 |
| 1999 | 4.5 | 20 |
| 1998 | 4.65 | 17 |
| 1997 | 4.75 | 19 |
| 1996 | 4.82 | 17 |
| 1995 | 4.85 | 15 |
| 1994 | 4.9 | 18 |
| 1993 | 4.97 | 23 |
| 1992 | 4.99 | 28 |
| 1991 | 4.24 | 52 |
| 1990 | 4.41 | 50 |
| 1989 | 4.55 | 47 |
| 1988 | 4.63 | 47 |
| 1987 | 4.6 | 55 |
| 1986 | 4.5 | 60 |