| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -2.39 | 109 |
| 2015 | -.13 | 120 |
| 2014 | 5.93 | 36 |
| 2013 | 5.65 | 44 |
| 2012 | 5.84 | 48 |
| 2011 | 4.13 | 52 |
| 2010 | 7.79 | 26 |
| 2009 | 14.33 | 22 |
| 2008 | 11.34 | 21 |
| 2007 | 8.28 | 35 |
| 2006 | 5.71 | 56 |
| 2005 | 1.66 | 103 |
| 2004 | -6.64 | 134 |
| 2003 | -1.45 | 126 |
| 2002 | -.09 | 113 |
| 2001 | 5.37 | 49 |
| 2000 | 7.85 | 24 |
| 1999 | 7.63 | 25 |
| 1998 | 9.7 | 21 |
| 1997 | 6.17 | 34 |
| 1996 | -.01 | 101 |
| 1995 | 1.32 | 70 |
| 1994 | 2.96 | 49 |
| 1993 | 8.43 | 19 |
| 1992 | 11.39 | 13 |
| 1991 | -1.26 | 91 |
| 1990 | 0.42 | 67 |
| 1989 | 3.81 | 41 |
| 1988 | 5.04 | 24 |
| 1987 | 7 | 22 |
| 1986 | 5.15 | 32 |