| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.9 | 60 |
| 2015 | 2.93 | 61 |
| 2014 | 2.97 | 60 |
| 2013 | 3 | 62 |
| 2012 | 3.03 | 63 |
| 2011 | 3.05 | 65 |
| 2010 | 3.07 | 66 |
| 2009 | 3.08 | 62 |
| 2008 | 3.1 | 64 |
| 2007 | 3.13 | 64 |
| 2006 | 3.16 | 65 |
| 2005 | 3.2 | 65 |
| 2004 | 3.23 | 62 |
| 2003 | 3.24 | 62 |
| 2002 | 3.24 | 62 |
| 2001 | 3.22 | 62 |
| 2000 | 3.19 | 62 |
| 1999 | 3.16 | 65 |
| 1998 | 3.15 | 66 |
| 1997 | 3.16 | 67 |
| 1996 | 3.19 | 68 |
| 1995 | 3.23 | 66 |
| 1994 | 3.26 | 64 |
| 1993 | 3.29 | 69 |
| 1992 | 3.3 | 74 |
| 1991 | 3.3 | 80 |
| 1990 | 3.3 | 85 |
| 1989 | 3.29 | 88 |
| 1988 | 3.31 | 89 |
| 1987 | 3.33 | 92 |
| 1986 | 3.37 | 89 |