| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.11 | 112 |
| 2015 | 5.06 | 110 |
| 2014 | 5.02 | 108 |
| 2013 | 4.96 | 108 |
| 2012 | 4.89 | 110 |
| 2011 | 4.83 | 111 |
| 2010 | 4.77 | 111 |
| 2009 | 4.77 | 110 |
| 2008 | 4.78 | 109 |
| 2007 | 4.82 | 109 |
| 2006 | 4.85 | 106 |
| 2005 | 4.88 | 104 |
| 2004 | 4.91 | 100 |
| 2003 | 4.92 | 100 |
| 2002 | 4.93 | 99 |
| 2001 | 4.92 | 99 |
| 2000 | 4.91 | 98 |
| 1999 | 4.89 | 98 |
| 1998 | 4.87 | 95 |
| 1997 | 4.84 | 93 |
| 1996 | 4.8 | 91 |
| 1995 | 4.74 | 90 |
| 1994 | 4.7 | 90 |
| 1993 | 4.65 | 89 |
| 1992 | 4.6 | 89 |
| 1991 | 4.55 | 88 |
| 1990 | 4.51 | 87 |
| 1989 | 4.49 | 85 |
| 1988 | 4.48 | 85 |
| 1987 | 4.48 | 82 |
| 1986 | 4.48 | 83 |