| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.33 | 84 |
| 2015 | 2.25 | 89 |
| 2014 | 2.18 | 89 |
| 2013 | 2.12 | 92 |
| 2012 | 2.06 | 94 |
| 2011 | 2.1 | 93 |
| 2010 | 2.15 | 95 |
| 2009 | 2.2 | 92 |
| 2008 | 2.24 | 90 |
| 2007 | 2.27 | 86 |
| 2006 | 2.3 | 88 |
| 2005 | 2.32 | 88 |
| 2004 | 2.33 | 85 |
| 2003 | 2.36 | 85 |
| 2002 | 2.39 | 89 |
| 2001 | 2.38 | 95 |
| 2000 | 1.29 | 134 |
| 1999 | 1.31 | 135 |
| 1998 | 1.33 | 132 |
| 1997 | 1.32 | 134 |
| 1996 | 1.3 | 137 |
| 1995 | 1.28 | 137 |
| 1994 | 1.26 | 138 |
| 1993 | 1.25 | 140 |
| 1992 | 1.24 | 138 |
| 1991 | 1.32 | 143 |
| 1990 | 3.88 | 65 |
| 1989 | 3.9 | 68 |
| 1988 | 3.92 | 74 |
| 1987 | 3.96 | 74 |
| 1986 | 4.01 | 72 |