| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.76 | 69 |
| 2015 | 3.57 | 60 |
| 2014 | 4.15 | 61 |
| 2013 | 2.83 | 92 |
| 2012 | 2.75 | 82 |
| 2011 | 0.49 | 137 |
| 2010 | 2.79 | 72 |
| 2009 | 2.83 | 84 |
| 2008 | 3.46 | 88 |
| 2007 | 7.4 | 30 |
| 2006 | 4.16 | 69 |
| 2005 | 1.42 | 95 |
| 2004 | 3.42 | 89 |
| 2003 | 2.51 | 86 |
| 2002 | 3.98 | 60 |
| 2001 | 3.77 | 64 |
| 2000 | 4.93 | 53 |
| 1999 | 7.58 | 34 |
| 1998 | 3.67 | 60 |
| 1997 | 7.08 | 21 |
| 1996 | 2.64 | 86 |
| 1995 | 3.14 | 71 |
| 1994 | 8.3 | 16 |
| 1993 | 2.71 | 54 |
| 1992 | 8.27 | 23 |
| 1991 | -1.75 | 92 |
| 1990 | 8.65 | 24 |
| 1989 | 10.78 | 12 |
| 1988 | -4.19 | 98 |
| 1987 | -1.92 | 77 |
| 1986 | 5.12 | 31 |