| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 2.07 | 111 |
| 2014 | 1.57 | 131 |
| 2013 | 1.45 | 136 |
| 2012 | 1 | 158 |
| 2011 | -.2 | 179 |
| 2010 | 2.92 | 102 |
| 2009 | 3.55 | 83 |
| 2008 | 5.83 | 75 |
| 2007 | 8.87 | 52 |
| 2006 | 9.34 | 43 |
| 2005 | 5.99 | 53 |
| 2004 | 1.59 | 126 |
| 2003 | 0.29 | 166 |
| 2002 | 0.74 | 137 |
| 2001 | 0.52 | 145 |
| 2000 | 1.24 | 125 |
| 1999 | 1.17 | 114 |
| 1998 | 1.27 | 123 |
| 1997 | 1.14 | 123 |
| 1996 | 0.94 | 110 |
| 1995 | 0.99 | 94 |
| 1994 | 2.42 | 45 |
| 1993 | 1.06 | 78 |
| 1992 | 1.1 | 63 |
| 1991 | 0.68 | 77 |
| 1990 | 1.7 | 45 |
| 1989 | 3.15 | 26 |
| 1988 | 3.4 | 20 |
| 1987 | 2.34 | 25 |
| 1986 | 3.39 | 15 |