| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 9.57 | 65 |
| 2015 | 9.06 | 75 |
| 2014 | 8.18 | 89 |
| 2013 | 6.24 | 117 |
| 2012 | 4.53 | 124 |
| 2011 | 12.49 | 70 |
| 2010 | 8.81 | 107 |
| 2009 | 8.11 | 94 |
| 2008 | 18.63 | 56 |
| 2007 | 13.39 | 112 |
| 2006 | 15.96 | 98 |
| 2005 | 15.04 | 82 |
| 2004 | 3.79 | 144 |
| 2003 | 5.37 | 125 |
| 2002 | -2 | 149 |
| 2001 | 14.61 | 80 |
| 2000 | 11.56 | 93 |
| 1999 | 19.59 | 46 |
| 1998 | 25.18 | 21 |
| 1997 | 29.06 | 31 |
| 1996 | 31.22 | 31 |
| 1995 | 35.62 | 31 |
| 1994 | 38.08 | 36 |
| 1993 | 35.99 | 28 |
| 1992 | 55.67 | 16 |
| 1991 | 37.9 | 24 |
| 1990 | 164.87 | 7 |
| 1989 | 509.49 | 5 |
| 1988 | 63.29 | 11 |
| 1987 | 34.05 | 27 |
| 1986 | 26.7 | 27 |