| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.04 | 80 |
| 2015 | 3.83 | 69 |
| 2014 | 3.28 | 96 |
| 2013 | 5.79 | 41 |
| 2012 | 5.1 | 58 |
| 2011 | 6.36 | 48 |
| 2010 | 1.64 | 155 |
| 2009 | -5.24 | 172 |
| 2008 | 3.19 | 117 |
| 2007 | 3.18 | 158 |
| 2006 | 9.84 | 26 |
| 2005 | 4.86 | 96 |
| 2004 | 9.57 | 26 |
| 2003 | 8.8 | 27 |
| 2002 | 2.43 | 119 |
| 2001 | 1.4 | 147 |
| 2000 | 10.85 | 8 |
| 1999 | 2.9 | 114 |
| 1998 | 0.29 | 163 |
| 1997 | 8.19 | 25 |
| 1996 | 5.8 | 63 |
| 1995 | 6.69 | 41 |
| 1994 | 6.9 | 33 |
| 1993 | 1.26 | 112 |
| 1992 | 3.34 | 73 |
| 1991 | 0.86 | 112 |
| 1990 | 18.33 | 5 |
| 1989 | 12.34 | 6 |
| 1988 | -2.62 | 154 |
| 1987 | 3.38 | 82 |
| 1986 | -14.96 | 158 |