| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.45 | 132 |
| 2015 | 0.37 | 165 |
| 2014 | 3.24 | 98 |
| 2013 | 4.64 | 69 |
| 2012 | 3.54 | 95 |
| 2011 | 5.16 | 72 |
| 2010 | 7.8 | 34 |
| 2009 | 4.24 | 40 |
| 2008 | 7.18 | 38 |
| 2007 | 6.54 | 80 |
| 2006 | 4.1 | 137 |
| 2005 | 7.46 | 46 |
| 2004 | 5 | 102 |
| 2003 | 0.81 | 169 |
| 2002 | -7.73 | 194 |
| 2001 | -3.84 | 191 |
| 2000 | -1.93 | 189 |
| 1999 | -1.94 | 177 |
| 1998 | 4.52 | 75 |
| 1997 | 8.55 | 22 |
| 1996 | 5.58 | 67 |
| 1995 | -1.45 | 167 |
| 1994 | 7.28 | 30 |
| 1993 | 2.66 | 89 |
| 1992 | 7.93 | 27 |
| 1991 | 3.54 | 65 |
| 1990 | 0.3 | 118 |
| 1989 | 1.1 | 121 |
| 1988 | 1.48 | 127 |
| 1987 | 7.99 | 27 |
| 1986 | 8.81 | 19 |