| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.87 | 32 |
| 2015 | 1.87 | 35 |
| 2014 | 1.85 | 35 |
| 2013 | 1.86 | 36 |
| 2012 | 1.57 | 49 |
| 2011 | 1.16 | 67 |
| 2010 | 1.16 | 70 |
| 2009 | 1.21 | 71 |
| 2008 | 0.95 | 88 |
| 2007 | 0.96 | 83 |
| 2006 | 1.08 | 80 |
| 2005 | 1.13 | 75 |
| 2004 | 1.21 | 71 |
| 2003 | 1.05 | 83 |
| 2002 | 0.92 | 84 |
| 2001 | 0.95 | 84 |
| 2000 | 1.19 | 75 |
| 1999 | 1.8 | 49 |
| 1998 | 1.97 | 47 |
| 1997 | 1.9 | 52 |
| 1996 | 1.92 | 48 |
| 1995 | 1.45 | 69 |
| 1994 | 0.42 | 113 |
| 1993 | 0.48 | 116 |
| 1992 | 1.61 | 65 |
| 1991 | 2.1 | 51 |
| 1990 | 2.39 | 34 |
| 1989 | 2.35 | 38 |
| 1988 | 1.85 | 59 |
| 1987 | 1.98 | 55 |
| 1986 | 1.97 | 56 |