| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 10.24 | 57 |
| 2015 | -2.98 | 141 |
| 2014 | 5.08 | 122 |
| 2013 | 26.51 | 6 |
| 2012 | 20.82 | 23 |
| 2011 | 10.6 | 82 |
| 2010 | 13.62 | 71 |
| 2009 | 3.17 | 130 |
| 2008 | 15.86 | 74 |
| 2007 | 39.81 | 21 |
| 2006 | 23.58 | 53 |
| 2005 | 34.44 | 20 |
| 2004 | 38.13 | 12 |
| 2003 | 30.36 | 22 |
| 2002 | 36.51 | 16 |
| 2001 | 34.11 | 35 |
| 2000 | 41.72 | 21 |
| 1999 | 42.86 | 11 |
| 1998 | -8.26 | 148 |
| 1997 | 34.46 | 23 |
| 1996 | 14.85 | 79 |
| 1995 | 65.32 | 11 |
| 1994 | 115.67 | 12 |
| 1993 | 318.78 | 6 |
| 1992 | 357.96 | 3 |