| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.69 | 57 |
| 2015 | 3.28 | 49 |
| 2014 | 4.18 | 33 |
| 2013 | 2.8 | 74 |
| 2012 | 3.54 | 52 |
| 2011 | 3.37 | 72 |
| 2010 | 5.05 | 46 |
| 2009 | -4.27 | 143 |
| 2008 | 1.47 | 116 |
| 2007 | 7.45 | 39 |
| 2006 | 3.63 | 104 |
| 2005 | 3.34 | 95 |
| 2004 | 4.72 | 72 |
| 2003 | 3.69 | 72 |
| 2002 | 3.21 | 62 |
| 2001 | -1.66 | 163 |
| 2000 | 6.37 | 31 |
| 1999 | 3.59 | 58 |
| 1998 | -9.66 | 191 |
| 1997 | 4.63 | 53 |
| 1996 | 7.24 | 24 |
| 1995 | 7.1 | 20 |
| 1994 | 6.52 | 18 |
| 1993 | 7.18 | 14 |
| 1992 | 6.12 | 25 |
| 1991 | 6.64 | 15 |
| 1990 | 5.97 | 19 |
| 1989 | 5.9 | 29 |
| 1988 | 6.69 | 29 |
| 1987 | 2.33 | 66 |
| 1986 | -1.66 | 123 |