| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.07 | 23 |
| 2015 | 3.62 | 38 |
| 2014 | 2.1 | 64 |
| 2013 | 1.78 | 73 |
| 2012 | 1.12 | 95 |
| 2011 | -5.43 | 151 |
| 2010 | 3.69 | 49 |
| 2009 | -3.38 | 119 |
| 2008 | 4.69 | 49 |
| 2007 | 7.49 | 34 |
| 2006 | 3.58 | 67 |
| 2005 | 7.01 | 34 |
| 2004 | 7.3 | 33 |
| 2003 | 4.26 | 48 |
| 2002 | 9.61 | 16 |
| 2001 | -10.45 | 134 |
| 2000 | 10.63 | 9 |
| 1999 | 2.93 | 54 |
| 1998 | 2.69 | 65 |
| 1997 | 2.58 | 63 |
| 1996 | 2.65 | 68 |
| 1995 | -3.69 | 106 |
| 1994 | 9.14 | 7 |
| 1993 | 9.4 | 9 |
| 1992 | -10.07 | 99 |
| 1991 | -7.66 | 96 |