| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 4.51 | 50 |
| 2014 | 0.08 | 150 |
| 2013 | 6.01 | 40 |
| 2012 | 6.09 | 54 |
| 2011 | 0.76 | 173 |
| 2010 | 0.43 | 170 |
| 2009 | 7.45 | 33 |
| 2008 | 7.33 | 111 |
| 2007 | 2.66 | 131 |
| 2006 | 6.54 | 67 |
| 2005 | 3.09 | 112 |
| 2004 | 2.43 | 110 |
| 2003 | -.63 | 162 |
| 2002 | 4.38 | 67 |
| 2001 | 0.06 | 158 |
| 2000 | -.88 | 157 |
| 1999 | 4.14 | 69 |
| 1996 | 10.03 | 61 |
| 1995 | 9.42 | 80 |
| 1994 | 42.44 | 27 |
| 1993 | 4.92 | 91 |
| 1992 | -3.94 | 138 |
| 1991 | -1.68 | 133 |
| 1990 | 2.89 | 117 |
| 1989 | -1.8 | 132 |
| 1988 | 1.03 | 116 |
| 1987 | 0.44 | 110 |
| 1986 | 4.16 | 76 |