| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.62 | 19 |
| 2015 | 3.69 | 36 |
| 2014 | 4.34 | 28 |
| 2013 | 5 | 24 |
| 2012 | 5.09 | 33 |
| 2011 | 5 | 46 |
| 2010 | 4.15 | 68 |
| 2009 | 1.53 | 48 |
| 2008 | 5.58 | 36 |
| 2007 | 5.51 | 68 |
| 2006 | 4.76 | 81 |
| 2005 | 4.5 | 69 |
| 2004 | 8.07 | 28 |
| 2003 | 8.82 | 19 |
| 2002 | 8.73 | 8 |
| 2001 | 8.27 | 12 |
| 2000 | 6.53 | 28 |
| 1999 | 2.12 | 91 |
| 1998 | 3.77 | 61 |
| 1997 | 0.25 | 152 |
| 1996 | -17.91 | 191 |
| 1995 | -13.69 | 183 |
| 1994 | -22.49 | 179 |
| 1993 | -17.76 | 174 |
| 1992 | -30.32 | 174 |
| 1991 | -9.11 | 162 |
| 1990 | -3.12 | 131 |
| 1989 | -9.2 | 159 |
| 1988 | 10.32 | 10 |
| 1987 | -4.4 | 145 |
| 1986 | 0.2 | 105 |