| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.58 | 63 |
| 2015 | 1.92 | 82 |
| 2014 | 1.01 | 128 |
| 2013 | 4.44 | 35 |
| 2012 | 4.74 | 35 |
| 2011 | 4.95 | 50 |
| 2010 | 6.96 | 23 |
| 2009 | -.16 | 78 |
| 2008 | 7.8 | 18 |
| 2007 | 7.2 | 41 |
| 2006 | 6.22 | 54 |
| 2005 | 4.99 | 58 |
| 2004 | 3.67 | 95 |
| 2003 | 2.86 | 92 |
| 2002 | 4.11 | 47 |
| 2001 | -.71 | 158 |
| 2000 | 1.29 | 137 |
| 1999 | 0.06 | 134 |
| 1998 | -1.86 | 168 |
| 1997 | 4.82 | 46 |
| 1996 | 1.11 | 132 |
| 1995 | 5.54 | 34 |
| 1994 | 10.24 | 6 |
| 1993 | 3.21 | 48 |
| 1992 | -2.53 | 131 |
| 1991 | 0.13 | 94 |
| 1990 | -6.98 | 154 |
| 1989 | -14.2 | 162 |
| 1988 | -11.43 | 159 |
| 1987 | 7.28 | 25 |
| 1986 | 6.96 | 16 |