| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.16 | 109 |
| 2015 | 3.74 | 116 |
| 2014 | 14 | 44 |
| 2013 | 8.72 | 88 |
| 2012 | 9.96 | 84 |
| 2011 | 6.68 | 108 |
| 2010 | 0.64 | 150 |
| 2009 | 7.99 | 98 |
| 2008 | 17.46 | 65 |
| 2007 | 20.46 | 69 |
| 2006 | 22.76 | 57 |
| 2005 | 27.68 | 35 |
| 2004 | 22.79 | 36 |
| 2003 | 24.68 | 32 |
| 2002 | 19.28 | 49 |
| 2001 | 154.39 | 4 |
| 2000 | 24.04 | 44 |
| 1999 | 30.15 | 23 |
| 1998 | 20.31 | 32 |
| 1997 | -45.47 | 154 |
| 1996 | 47.59 | 14 |
| 1995 | 4.69 | 126 |
| 1994 | 21.98 | 69 |
| 1993 | 15.13 | 77 |
| 1992 | 24.16 | 46 |
| 1991 | 33.67 | 29 |
| 1990 | 27.4 | 34 |
| 1989 | 16.63 | 62 |
| 1988 | 39.83 | 18 |
| 1987 | 16.27 | 63 |
| 1986 | 20.95 | 39 |