| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.27 | 38 |
| 2015 | 3.63 | 39 |
| 2014 | 2.54 | 77 |
| 2013 | 1.13 | 120 |
| 2012 | 3.59 | 50 |
| 2011 | 3.06 | 80 |
| 2010 | 3.64 | 77 |
| 2009 | -2.27 | 112 |
| 2008 | 3.23 | 78 |
| 2007 | 6.67 | 48 |
| 2006 | 5.72 | 62 |
| 2005 | 2.38 | 127 |
| 2004 | 2.81 | 123 |
| 2003 | 2.67 | 98 |
| 2002 | 1.6 | 99 |
| 2001 | 1.64 | 97 |
| 2000 | 1.71 | 131 |
| 1999 | 1.75 | 99 |
| 1998 | 4.56 | 41 |
| 1997 | 3.1 | 85 |
| 1996 | -1.18 | 171 |
| 1995 | 1.59 | 111 |
| 1994 | 1.9 | 90 |
| 1993 | 4.41 | 34 |
| 1992 | 6.45 | 23 |
| 1991 | 0 | 98 |
| 1990 | 1.32 | 83 |
| 1989 | 2.48 | 68 |
| 1988 | 1.27 | 103 |
| 1987 | 4.23 | 44 |
| 1986 | 3.11 | 49 |