| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | -1.25 | 125 |
| 2014 | -2.03 | 139 |
| 2013 | 17.87 | 6 |
| 2012 | -2.64 | 141 |
| 2011 | -5.61 | 152 |
| 2010 | -11.36 | 157 |
| 2009 | 28.26 | 2 |
| 2008 | -21.48 | 157 |
| 2007 | 34.07 | 1 |
| 2006 | -20.84 | 146 |
| 2005 | 6.42 | 44 |
| 2004 | 5.07 | 47 |
| 2003 | 12.47 | 8 |
| 2002 | -1.89 | 121 |
| 2001 | 37.93 | 2 |
| 2000 | -.68 | 98 |
| 1999 | -8.33 | 123 |
| 1998 | -1.77 | 110 |
| 1997 | -5.84 | 120 |
| 1996 | 17.18 | 5 |
| 1995 | 3.59 | 43 |
| 1994 | -6.97 | 97 |
| 1993 | -4.37 | 91 |
| 1992 | 8.48 | 9 |
| 1991 | 0.54 | 61 |
| 1990 | 19.51 | 3 |
| 1989 | -6.1 | 81 |
| 1988 | 8.43 | 8 |
| 1987 | -23.18 | 88 |
| 1986 | -20.71 | 86 |