| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.86 | 166 |
| 2015 | 2.65 | 106 |
| 2014 | 6.78 | 23 |
| 2013 | 3.44 | 92 |
| 2012 | 3.8 | 91 |
| 2011 | 3.42 | 108 |
| 2010 | 8.75 | 18 |
| 2009 | 7.47 | 16 |
| 2008 | 5.57 | 73 |
| 2007 | -1.58 | 198 |
| 2006 | 6.24 | 82 |
| 2005 | 7.76 | 38 |
| 2004 | 3.48 | 147 |
| 2003 | 0.81 | 168 |
| 2002 | 4.58 | 61 |
| 2001 | 3.8 | 78 |
| 2000 | 7.58 | 28 |
| 1999 | -2.58 | 181 |
| 1998 | 3.74 | 102 |
| 1997 | -.62 | 171 |
| 1996 | 4.29 | 95 |
| 1995 | 3.99 | 98 |
| 1994 | -5.49 | 170 |
| 1993 | -.98 | 144 |
| 1992 | 2.61 | 81 |
| 1991 | 2.4 | 86 |
| 1990 | 1 | 110 |
| 1989 | 2.6 | 106 |
| 1988 | 1.77 | 123 |
| 1987 | 0.19 | 130 |
| 1986 | -6.86 | 154 |