| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -2.14 | 167 |
| 2015 | -21.54 | 190 |
| 2014 | -1.2 | 186 |
| 2013 | 11.2 | 6 |
| 2012 | 9.24 | 11 |
| 2011 | 21.67 | 1 |
| 2010 | 25.26 | 1 |
| 2009 | 1.32 | 86 |
| 2008 | 3.39 | 107 |
| 2007 | 14.45 | 8 |
| 2006 | 13.31 | 6 |
| 2005 | 8.06 | 36 |
| 2004 | 26.76 | 5 |
| 2003 | 11.65 | 11 |
| 2002 | 8.95 | 11 |
| 2001 | 2.89 | 105 |
| 2000 | 5.75 | 57 |
| 1999 | -2.36 | 179 |
| 1998 | -4.57 | 186 |
| 1997 | -.28 | 170 |
| 1996 | -.42 | 180 |
| 1995 | 3.3 | 109 |
| 1994 | 4.25 | 74 |
| 1993 | 5.19 | 50 |
| 1992 | 13.3 | 7 |
| 1991 | 3.66 | 61 |
| 1990 | 7.98 | 20 |
| 1989 | 5.02 | 53 |
| 1988 | 7.81 | 35 |
| 1987 | 14.29 | 4 |
| 1986 | 6.69 | 34 |