| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.47 | 163 |
| 2015 | 0.16 | 168 |
| 2014 | 3.99 | 78 |
| 2013 | 4.95 | 59 |
| 2012 | 5.64 | 46 |
| 2011 | 7.87 | 29 |
| 2010 | 3.53 | 112 |
| 2009 | 0.57 | 95 |
| 2008 | 6.36 | 54 |
| 2007 | 2.19 | 170 |
| 2006 | 4.4 | 133 |
| 2005 | 5.29 | 92 |
| 2004 | 8.21 | 35 |
| 2003 | 2.72 | 133 |
| 2002 | 4.1 | 74 |
| 2001 | 4.02 | 71 |
| 2000 | 1.09 | 167 |
| 1999 | -4.74 | 189 |
| 1998 | 3.27 | 119 |
| 1997 | 4.33 | 97 |
| 1996 | 1.73 | 147 |
| 1995 | 2.25 | 134 |
| 1994 | 4.26 | 73 |
| 1993 | 1.97 | 101 |
| 1992 | 2.11 | 84 |
| 1991 | 4.29 | 57 |
| 1990 | 3.68 | 77 |
| 1989 | 1.01 | 123 |
| 1988 | 5.89 | 57 |
| 1987 | -.26 | 136 |
| 1986 | 3.46 | 81 |