| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.69 | 69 |
| 2015 | 4.18 | 55 |
| 2014 | 6.38 | 32 |
| 2013 | 5.55 | 46 |
| 2012 | 5.57 | 53 |
| 2011 | 5.63 | 40 |
| 2010 | 5.53 | 43 |
| 2009 | 13.51 | 28 |
| 2008 | 2.58 | 101 |
| 2007 | 15.44 | 18 |
| 2006 | 5.11 | 67 |
| 2005 | 8.84 | 34 |
| 2004 | 5.11 | 44 |
| 2003 | 6.82 | 33 |
| 2002 | 4.71 | 55 |
| 2001 | 0.1 | 119 |
| 2000 | -13.02 | 130 |
| 1999 | 13.02 | 15 |
| 1998 | 2.48 | 76 |
| 1997 | 4.08 | 46 |
| 1996 | 4.48 | 42 |
| 1995 | 6.94 | 21 |
| 1994 | 7.21 | 21 |
| 1993 | 6.6 | 26 |
| 1992 | -3.72 | 93 |
| 1991 | 12.92 | 12 |
| 1990 | 18.42 | 4 |
| 1989 | 14.77 | 8 |
| 1988 | 22.25 | 5 |
| 1987 | 20.08 | 5 |
| 1986 | 4.79 | 33 |