| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.45 | 30 |
| 2015 | 1.61 | 128 |
| 2014 | -1.5 | 183 |
| 2013 | 0.27 | 164 |
| 2012 | 0.79 | 162 |
| 2011 | 1.24 | 150 |
| 2010 | 0.13 | 177 |
| 2009 | 2.09 | 120 |
| 2008 | 8.06 | 55 |
| 2007 | 9.46 | 49 |
| 2006 | 5.25 | 78 |
| 2005 | 5.34 | 64 |
| 2004 | 4.42 | 59 |
| 2003 | 1.81 | 114 |
| 2002 | 6.96 | 24 |
| 2001 | 7.59 | 26 |
| 2000 | 8.78 | 19 |
| 1999 | 22.38 | 6 |
| 1998 | 7.5 | 27 |
| 1997 | 3.88 | 49 |
| 1996 | 1.91 | 73 |
| 1995 | 5.66 | 21 |
| 1994 | 2.77 | 33 |
| 1993 | 1.76 | 51 |
| 1992 | 0 | 136 |
| 1991 | 2.35 | 38 |
| 1990 | 0.77 | 77 |
| 1989 | 0.84 | 62 |
| 1988 | 0.82 | 56 |
| 1987 | 0.35 | 85 |
| 1986 | 0.73 | 49 |