| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.57 | 74 |
| 2015 | 9.17 | 20 |
| 2014 | 6.72 | 26 |
| 2013 | 9.29 | 25 |
| 2012 | 4.89 | 57 |
| 2011 | 7.24 | 32 |
| 2010 | 3.07 | 70 |
| 2009 | 3.82 | 84 |
| 2008 | 3.9 | 74 |
| 2007 | 3.78 | 81 |
| 2006 | 3.27 | 86 |
| 2005 | 3.36 | 73 |
| 2004 | 3.15 | 76 |
| 2003 | 3.57 | 62 |
| 2002 | 3.46 | 71 |
| 2001 | 2.86 | 86 |
| 2000 | 2.08 | 79 |
| 1999 | 3.21 | 62 |
| 1998 | 3.8 | 48 |
| 1997 | 3.36 | 53 |
| 1996 | 2.61 | 68 |
| 1995 | 6.63 | 25 |
| 1994 | 3.13 | 46 |
| 1993 | 2.53 | 58 |
| 1992 | 3.69 | 39 |
| 1991 | 3.34 | 49 |
| 1990 | -.09 | 69 |
| 1989 | 0.88 | 70 |
| 1988 | 3.77 | 36 |
| 1987 | -3.81 | 83 |
| 1986 | -14.12 | 92 |