| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.3 | 70 |
| 2015 | 3.2 | 75 |
| 2014 | 7.5 | 30 |
| 2013 | 7.6 | 40 |
| 2012 | 0.8 | 113 |
| 2011 | 10.24 | 28 |
| 2010 | 5.82 | 78 |
| 2009 | -19.87 | 169 |
| 2008 | 1.8 | 102 |
| 2007 | -1.14 | 145 |
| 2006 | -3.79 | 156 |
| 2005 | 2.62 | 114 |
| 2004 | 8.11 | 48 |
| 2003 | 17.87 | 10 |
| 2002 | 3.16 | 90 |
| 2001 | 5.61 | 42 |
| 2000 | 15.69 | 10 |
| 1999 | -5.94 | 147 |
| 1998 | -16.34 | 158 |
| 1997 | -13.1 | 152 |
| 1996 | -1.66 | 132 |