| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.86 | 33 |
| 2015 | 2 | 31 |
| 2014 | 2.13 | 24 |
| 2013 | 2.21 | 22 |
| 2012 | 2.2 | 24 |
| 2011 | 2.14 | 34 |
| 2010 | 2.01 | 39 |
| 2009 | 1.88 | 49 |
| 2008 | 1.8 | 50 |
| 2007 | 1.74 | 53 |
| 2006 | 1.7 | 52 |
| 2005 | 1.75 | 53 |
| 2004 | 1.79 | 49 |
| 2003 | 1.82 | 47 |
| 2002 | 1.82 | 47 |
| 2001 | 1.79 | 50 |
| 2000 | 1.76 | 48 |
| 1999 | 1.76 | 52 |
| 1998 | 1.76 | 53 |
| 1997 | 1.9 | 51 |
| 1996 | 2.13 | 42 |
| 1995 | 2.16 | 41 |
| 1994 | 2.21 | 43 |
| 1993 | 2.28 | 43 |
| 1992 | 2.39 | 37 |
| 1991 | 2.54 | 33 |
| 1990 | 2.71 | 26 |
| 1989 | 2.88 | 20 |
| 1988 | 2.99 | 18 |
| 1987 | 2.92 | 22 |
| 1986 | 2.73 | 30 |