| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.24 | 30 |
| 2015 | 2.93 | 50 |
| 2014 | 1.9 | 68 |
| 2013 | -2.79 | 145 |
| 2012 | -3.58 | 148 |
| 2011 | -2.7 | 140 |
| 2010 | -.21 | 128 |
| 2009 | -4.47 | 132 |
| 2008 | -2.23 | 135 |
| 2007 | 1.37 | 110 |
| 2006 | 2.06 | 89 |
| 2005 | 2.26 | 100 |
| 2004 | 2.25 | 97 |
| 2003 | 0.55 | 103 |
| 2002 | 1.55 | 83 |
| 2001 | 3.01 | 47 |
| 2000 | 4.09 | 32 |
| 1999 | 4.46 | 35 |
| 1998 | 4.01 | 46 |
| 1997 | 2.43 | 67 |
| 1996 | 2.03 | 80 |
| 1995 | 1.27 | 71 |
| 1994 | 0.6 | 74 |
| 1993 | -2.41 | 84 |
| 1992 | 1.67 | 47 |
| 1991 | 2.63 | 37 |
| 1990 | 3.41 | 25 |
| 1989 | 5.26 | 20 |
| 1988 | 4.67 | 31 |
| 1987 | 5.68 | 15 |
| 1986 | 3.09 | 37 |