| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.33 | 74 |
| 2015 | 6.38 | 31 |
| 2014 | 5.45 | 42 |
| 2013 | 7.1 | 33 |
| 2012 | 4.92 | 47 |
| 2011 | 9.01 | 28 |
| 2010 | 5.13 | 49 |
| 2009 | 6.36 | 36 |
| 2008 | 7.5 | 42 |
| 2007 | 9.45 | 21 |
| 2006 | 10.91 | 12 |
| 2005 | 13.54 | 10 |
| 2004 | 16.94 | 13 |
| 2003 | -10.48 | 159 |
| 2002 | -1.88 | 128 |
| 2001 | 9.62 | 27 |
| 2000 | 3.05 | 73 |
| 1999 | 3.4 | 77 |
| 1998 | -9.64 | 153 |
| 1997 | 2 | 79 |
| 1996 | 16.96 | 13 |
| 1995 | 3.77 | 59 |
| 1994 | -2.58 | 100 |
| 1993 | 6.59 | 27 |
| 1992 | -1.57 | 87 |
| 1991 | 2.47 | 54 |
| 1990 | 5.43 | 41 |
| 1989 | 0.94 | 71 |
| 1988 | -1.44 | 88 |
| 1987 | 17.38 | 7 |
| 1986 | 16.52 | 6 |