| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.29 | 94 |
| 2015 | 6.79 | 32 |
| 2014 | 2.95 | 68 |
| 2013 | 5.32 | 47 |
| 2012 | 3.01 | 78 |
| 2011 | 4.56 | 50 |
| 2010 | 5.45 | 45 |
| 2009 | 5.63 | 65 |
| 2008 | 5.02 | 58 |
| 2007 | 7.83 | 38 |
| 2006 | 3.72 | 82 |
| 2005 | 9.86 | 27 |
| 2004 | 2.72 | 79 |
| 2003 | 1.46 | 96 |
| 2002 | -5.08 | 134 |
| 2001 | -2.07 | 127 |
| 2000 | 0.58 | 101 |
| 1999 | 2.62 | 71 |
| 1998 | 3.36 | 59 |
| 1997 | 3.22 | 56 |
| 1996 | 2.17 | 75 |
| 1995 | 0.76 | 76 |
| 1994 | 0.44 | 76 |