| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.01 | 56 |
| 2015 | 1.44 | 89 |
| 2014 | 2 | 99 |
| 2013 | 2.63 | 93 |
| 2012 | 2.62 | 127 |
| 2011 | 5.41 | 77 |
| 2010 | 3.31 | 94 |
| 2009 | -.7 | 165 |
| 2008 | 5.86 | 124 |
| 2007 | 4.75 | 97 |
| 2006 | 1.46 | 163 |
| 2005 | 1.82 | 146 |
| 2004 | 3.88 | 82 |
| 2003 | 1.16 | 138 |
| 2002 | -.77 | 164 |
| 2001 | 0.72 | 153 |
| 2000 | 0.26 | 146 |
| 1999 | -1.41 | 155 |
| 1998 | -.84 | 160 |
| 1997 | 2.81 | 115 |
| 1996 | 8.32 | 71 |
| 1995 | 16.9 | 52 |
| 1994 | 24.24 | 51 |
| 1993 | 14.58 | 48 |
| 1992 | 6.34 | 77 |
| 1991 | 3.54 | 107 |
| 1990 | 3.06 | 113 |
| 1989 | 18.33 | 31 |
| 1988 | 18.74 | 32 |
| 1987 | 7.22 | 61 |