| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.1 | 133 |
| 2015 | 4.1 | 129 |
| 2014 | 4.16 | 127 |
| 2013 | 4.24 | 125 |
| 2012 | 4.32 | 123 |
| 2011 | 4.41 | 120 |
| 2010 | 4.47 | 118 |
| 2009 | 4.48 | 117 |
| 2008 | 4.46 | 117 |
| 2007 | 4.42 | 118 |
| 2006 | 4.36 | 118 |
| 2005 | 4.28 | 117 |
| 2004 | 4.19 | 118 |
| 2003 | 4.08 | 122 |
| 2002 | 3.95 | 123 |
| 2001 | 3.82 | 125 |
| 2000 | 3.68 | 130 |
| 1999 | 3.54 | 133 |
| 1998 | 3.39 | 139 |
| 1997 | 3.26 | 143 |
| 1996 | 3.14 | 145 |
| 1995 | 3.03 | 155 |
| 1994 | 2.96 | 163 |
| 1993 | 2.91 | 165 |
| 1992 | 2.88 | 166 |
| 1991 | 2.84 | 167 |
| 1990 | 2.8 | 166 |
| 1989 | 2.78 | 166 |
| 1988 | 2.75 | 166 |
| 1987 | 2.72 | 170 |
| 1986 | 2.69 | 173 |