| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.25 | 56 |
| 2015 | 3.77 | 56 |
| 2014 | 4.24 | 57 |
| 2013 | 4.2 | 67 |
| 2012 | 4.59 | 53 |
| 2011 | 3.95 | 85 |
| 2010 | 3.01 | 69 |
| 2009 | 3.96 | 56 |
| 2008 | 4.83 | 71 |
| 2007 | 3.47 | 76 |
| 2006 | 3.36 | 83 |
| 2005 | 2.72 | 72 |
| 2004 | 2.82 | 96 |
| 2003 | 3.79 | 62 |
| 2002 | 3.45 | 65 |
| 2001 | 3.26 | 71 |
| 2000 | 1.88 | 87 |
| 1999 | 2.16 | 96 |
| 1998 | -1.33 | 116 |
| 1997 | 1 | 89 |
| 1996 | 3.14 | 79 |
| 1995 | 4.38 | 53 |
| 1994 | 0.56 | 79 |
| 1993 | 1.42 | 70 |
| 1992 | 6.89 | 26 |
| 1991 | 1.37 | 70 |
| 1990 | 2 | 65 |
| 1989 | 3.32 | 55 |
| 1988 | 4.9 | 43 |
| 1987 | 2.14 | 56 |
| 1986 | 2.59 | 56 |