| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.62 | 61 |
| 2015 | 2.49 | 69 |
| 2014 | 3.12 | 63 |
| 2013 | 4.53 | 33 |
| 2012 | 4.26 | 41 |
| 2011 | 5.08 | 43 |
| 2010 | 4.25 | 63 |
| 2009 | 3.4 | 26 |
| 2008 | 2.19 | 101 |
| 2007 | 7.27 | 40 |
| 2006 | 5.32 | 69 |
| 2005 | -1.86 | 194 |
| 2004 | 3.32 | 103 |
| 2003 | -1 | 175 |
| 2002 | 1.1 | 121 |
| 2001 | 2.39 | 77 |
| 2000 | -1.12 | 167 |
| 1999 | 3.33 | 65 |
| 1998 | -1.38 | 164 |
| 1997 | 6.42 | 28 |
| 1996 | 7.8 | 18 |
| 1995 | 4.58 | 41 |
| 1994 | 7.83 | 12 |
| 1993 | 7.45 | 11 |
| 1992 | 7.28 | 16 |
| 1991 | 5.85 | 20 |
| 1990 | -2.73 | 126 |
| 1989 | -4.3 | 149 |
| 1988 | -2.82 | 143 |
| 1987 | 1.83 | 76 |
| 1986 | -.13 | 109 |