| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.12 | 120 |
| 2015 | -.46 | 146 |
| 2014 | -.22 | 157 |
| 2013 | 2.22 | 104 |
| 2012 | 3.41 | 99 |
| 2011 | 2.27 | 159 |
| 2010 | 1.03 | 159 |
| 2009 | 2.38 | 103 |
| 2008 | 6.08 | 122 |
| 2007 | 2.9 | 124 |
| 2006 | 3.19 | 117 |
| 2005 | 3.32 | 109 |
| 2004 | 2.06 | 127 |
| 2003 | 1.77 | 123 |
| 2002 | 1.67 | 130 |
| 2001 | 3.78 | 90 |
| 2000 | 4.61 | 63 |
| 1999 | 4.02 | 73 |
| 1998 | 6.4 | 72 |
| 1997 | 4.13 | 94 |
| 1996 | 4.34 | 106 |
| 1995 | 4.04 | 118 |
| 1994 | 107.15 | 15 |
| 1993 | 1494.68 | 4 |