| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 4.182 | 60 |
| 2014 | 10.101 | 4 |
| 2013 | 5.299 | 61 |
| 2012 | 5.826 | 58 |
| 2011 | 7.829 | 27 |
| 2010 | 10.703 | 14 |
| 2009 | 6.269 | 29 |
| 2008 | 18.748 | 3 |
| 2007 | 23.576 | 2 |
| 2006 | 10.926 | 22 |
| 2005 | 10.877 | 18 |
| 2004 | 15.207 | 8 |
| 2003 | 13.552 | 5 |
| 2002 | 9.556 | 14 |
| 2001 | 7.937 | 17 |
| 2000 | 7.439 | 31 |
| 1999 | 3.587 | 84 |
| 1998 | 4.913 | 51 |
| 1997 | 1.851 | 124 |
| 1996 | -15.898 | 152 |
| 1995 | -12.086 | 134 |
| 1994 | -22.358 | 132 |
| 1993 | -18.587 | 126 |
| 1992 | -29.31 | 130 |
| 1991 | -7.371 | 119 |
| 1990 | 2.2 | 72 |
| 1989 | 6.4 | 29 |
| 1988 | 5.8 | 33 |
| 1987 | -1.2 | 95 |
| 1986 | 3.4 | 57 |