| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 23.53 | 9 |
| 2015 | 3.89 | 115 |
| 2014 | 25.91 | 9 |
| 2013 | 3.75 | 135 |
| 2012 | 5.79 | 115 |
| 2011 | 4.39 | 130 |
| 2010 | 16.64 | 54 |
| 2009 | 25.84 | 22 |
| 2008 | 26.17 | 32 |
| 2007 | 11.78 | 122 |
| 2006 | 18.66 | 79 |
| 2005 | 12.99 | 93 |
| 2004 | 16.17 | 68 |
| 2003 | 5.08 | 127 |
| 2002 | 43.12 | 10 |
| 2001 | 7.85 | 114 |
| 2000 | 17.37 | 59 |
| 1999 | 32.05 | 19 |
| 1998 | 13.94 | 60 |
| 1997 | 58.94 | 10 |
| 1996 | 8.95 | 107 |
| 1995 | 35.63 | 30 |
| 1994 | 23.34 | 66 |
| 1993 | 22.37 | 56 |
| 1992 | 13.53 | 77 |
| 1991 | 29.58 | 35 |
| 1990 | 10.48 | 78 |
| 1989 | 34.93 | 26 |
| 1988 | 30.99 | 27 |
| 1987 | 10.81 | 79 |
| 1986 | 7.46 | 95 |