| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.09 | 93 |
| 2015 | 2.12 | 93 |
| 2014 | 2.15 | 91 |
| 2013 | 2.18 | 90 |
| 2012 | 2.21 | 89 |
| 2011 | 2.25 | 89 |
| 2010 | 2.28 | 84 |
| 2009 | 2.31 | 82 |
| 2008 | 2.35 | 84 |
| 2007 | 2.39 | 81 |
| 2006 | 2.43 | 84 |
| 2005 | 2.47 | 82 |
| 2004 | 2.51 | 81 |
| 2003 | 2.55 | 77 |
| 2002 | 2.59 | 81 |
| 2001 | 2.64 | 83 |
| 2000 | 2.68 | 77 |
| 1999 | 2.72 | 77 |
| 1998 | 2.76 | 79 |
| 1997 | 2.78 | 77 |
| 1996 | 2.8 | 80 |
| 1995 | 3.01 | 73 |
| 1994 | 3.03 | 78 |
| 1993 | 3.04 | 79 |
| 1992 | 3.67 | 61 |
| 1991 | 3.75 | 66 |
| 1990 | 3.79 | 67 |
| 1989 | 3.82 | 71 |
| 1988 | 3.87 | 76 |
| 1987 | 3.93 | 76 |
| 1986 | 4 | 74 |