| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.68 | 90 |
| 2015 | 1.76 | 88 |
| 2014 | 1.96 | 91 |
| 2013 | 8.74 | 7 |
| 2012 | -1.74 | 171 |
| 2011 | 4.67 | 57 |
| 2010 | -1.65 | 177 |
| 2009 | 1.65 | 45 |
| 2008 | 7.38 | 21 |
| 2007 | 7.51 | 38 |
| 2006 | 2 | 141 |
| 2005 | -1.3 | 191 |
| 2004 | 5.74 | 53 |
| 2003 | 5.91 | 39 |
| 2002 | -.93 | 156 |
| 2001 | 4.33 | 37 |
| 2000 | 4.18 | 62 |
| 1999 | 2.13 | 90 |
| 1998 | 0.57 | 136 |
| 1997 | 8.32 | 17 |
| 1996 | 5.51 | 39 |
| 1995 | -6.36 | 171 |
| 1994 | -20.06 | 176 |
| 1993 | -15.48 | 171 |
| 1992 | -14.88 | 170 |
| 1991 | -9.35 | 163 |
| 1990 | 3.69 | 46 |
| 1989 | 0.66 | 102 |
| 1988 | 11.22 | 7 |
| 1987 | 1.35 | 81 |