| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.24 | 85 |
| 2015 | 0.2 | 112 |
| 2014 | 0.28 | 128 |
| 2013 | 1.57 | 110 |
| 2012 | 4.31 | 56 |
| 2011 | 3.08 | 102 |
| 2010 | 3.96 | 59 |
| 2009 | 5.42 | 44 |
| 2008 | 5.71 | 62 |
| 2007 | 5.03 | 55 |
| 2006 | 5.48 | 46 |
| 2005 | 15.72 | 9 |
| 2004 | -.87 | 141 |
| 2003 | 10.51 | 19 |
| 2002 | -2.49 | 135 |
| 2001 | 3.56 | 67 |
| 2000 | -.38 | 107 |
| 1999 | 2.23 | 95 |
| 1998 | 5.18 | 41 |
| 1997 | 5.42 | 34 |
| 1996 | 1.31 | 106 |
| 1995 | 3.33 | 67 |
| 1994 | 9.72 | 13 |