| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.11 | 20 |
| 2015 | 2.25 | 20 |
| 2014 | 2.37 | 19 |
| 2013 | 2.24 | 21 |
| 2012 | 2.03 | 34 |
| 2011 | 2.69 | 17 |
| 2010 | 2.56 | 20 |
| 2009 | 1.93 | 45 |
| 2008 | 2.55 | 18 |
| 2007 | 3.26 | 11 |
| 2006 | 3.85 | 6 |
| 2005 | 3.84 | 6 |
| 2004 | 3.02 | 14 |
| 2003 | 3.36 | 12 |
| 2002 | 1.41 | 64 |
| 2001 | -6.5 | 204 |
| 2000 | -9.9 | 204 |
| 1999 | -9.33 | 204 |
| 1998 | -7.44 | 204 |
| 1997 | -5.25 | 204 |
| 1996 | -4.86 | 202 |
| 1995 | -5.26 | 202 |
| 1994 | -5.33 | 201 |
| 1993 | -5.24 | 201 |
| 1992 | -3.7 | 200 |
| 1991 | -2.46 | 194 |
| 1990 | -2.82 | 196 |
| 1989 | -3.32 | 196 |
| 1988 | -3.22 | 195 |
| 1987 | -2.54 | 193 |
| 1986 | -1.77 | 187 |