| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.46 | 106 |
| 2015 | 5.33 | 105 |
| 2014 | 5.26 | 105 |
| 2013 | 5.21 | 104 |
| 2012 | 5.17 | 104 |
| 2011 | 5.13 | 103 |
| 2010 | 5.08 | 103 |
| 2009 | 5.04 | 104 |
| 2008 | 4.99 | 103 |
| 2007 | 4.94 | 105 |
| 2006 | 4.89 | 105 |
| 2005 | 4.84 | 106 |
| 2004 | 4.77 | 107 |
| 2003 | 4.7 | 106 |
| 2002 | 4.63 | 104 |
| 2001 | 4.56 | 105 |
| 2000 | 4.47 | 106 |
| 1999 | 4.46 | 106 |
| 1998 | 4.42 | 106 |
| 1997 | 4.36 | 107 |
| 1996 | 4.27 | 107 |
| 1995 | 4.17 | 107 |
| 1994 | 4.11 | 107 |
| 1993 | 4.05 | 107 |
| 1992 | 4 | 111 |
| 1991 | 3.94 | 112 |
| 1990 | 3.85 | 113 |
| 1989 | 3.71 | 120 |
| 1988 | 3.54 | 126 |
| 1987 | 3.36 | 133 |
| 1986 | 3.19 | 138 |