| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.64 | 57 |
| 2015 | 2.49 | 74 |
| 2014 | 1.89 | 86 |
| 2013 | 5.85 | 41 |
| 2012 | 11.29 | 23 |
| 2011 | 22.94 | 4 |
| 2010 | 69.21 | 1 |
| 2009 | 42.94 | 3 |
| 2008 | 5.67 | 54 |
| 2007 | 4.38 | 74 |
| 2003 | 3.81 | 57 |
| 2002 | 14.35 | 12 |
| 2001 | 3.83 | 68 |
| 2000 | 3.91 | 50 |
| 1999 | 5.8 | 34 |
| 1998 | -6.12 | 123 |
| 1997 | 3.46 | 52 |
| 1996 | 2.39 | 70 |
| 1995 | 0.44 | 79 |
| 1994 | -4.6 | 103 |
| 1993 | -4.78 | 102 |
| 1992 | 2.33 | 56 |
| 1991 | -6.79 | 101 |
| 1990 | -2.24 | 74 |
| 1989 | 8.73 | 17 |
| 1988 | -.31 | 69 |
| 1987 | 7.64 | 17 |