| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.07 | 137 |
| 2015 | 2.62 | 66 |
| 2014 | 3.15 | 61 |
| 2013 | 2.89 | 69 |
| 2012 | 6.96 | 14 |
| 2011 | 4.76 | 54 |
| 2010 | 2.6 | 99 |
| 2009 | -13.57 | 194 |
| 2008 | 7.81 | 17 |
| 2007 | 14.74 | 4 |
| 2006 | 14.07 | 5 |
| 2005 | 14.6 | 2 |
| 2004 | 11.1 | 10 |
| 2003 | 14.65 | 2 |
| 2002 | 13.81 | 3 |
| 2001 | 10.24 | 6 |
| 2000 | 6.57 | 27 |
| 1999 | 3.96 | 48 |
| 1998 | 8.14 | 15 |
| 1997 | 4.48 | 54 |
| 1996 | 7.51 | 22 |
| 1995 | 9.1 | 8 |
| 1994 | 7.95 | 11 |
| 1993 | -6.64 | 159 |
| 1992 | -40.74 | 176 |
| 1991 | -10.87 | 166 |