| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.05 | 110 |
| 2015 | 2.39 | 114 |
| 2014 | 2.76 | 110 |
| 2013 | 3.1 | 97 |
| 2012 | 1.7 | 133 |
| 2011 | 4.81 | 81 |
| 2010 | 6.77 | 50 |
| 2009 | -2.46 | 134 |
| 2008 | 2.13 | 136 |
| 2007 | 6.46 | 83 |
| 2006 | 7.03 | 64 |
| 2005 | 7.39 | 47 |
| 2004 | 8.7 | 31 |
| 2003 | 3.06 | 126 |
| 2002 | 1.66 | 136 |
| 2001 | 0.56 | 163 |
| 2000 | 7.66 | 27 |
| 1999 | 2.51 | 123 |
| 1998 | -5.88 | 189 |
| 1997 | 5.1 | 80 |
| 1996 | 4.26 | 97 |
| 1995 | 2.37 | 131 |
| 1994 | 6.04 | 42 |
| 1993 | 6.2 | 37 |
| 1992 | 6.23 | 42 |
| 1991 | 5.7 | 40 |
| 1990 | 3.83 | 73 |
| 1989 | 2.28 | 111 |
| 1988 | 8.51 | 29 |
| 1987 | 13.4 | 7 |
| 1986 | 11.06 | 10 |