| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.12 | 98 |
| 2015 | 0.18 | 128 |
| 2014 | 0.63 | 128 |
| 2013 | 0 | 166 |
| 2012 | 2.21 | 140 |
| 2011 | 4.4 | 105 |
| 2010 | -1.07 | 175 |
| 2009 | 3.47 | 80 |
| 2008 | 15.43 | 32 |
| 2007 | 10.14 | 26 |
| 2006 | 6.5 | 68 |
| 2005 | 6.72 | 66 |
| 2004 | 6.22 | 60 |
| 2003 | 2.96 | 94 |
| 2002 | 1.92 | 120 |
| 2001 | 2.48 | 121 |
| 2000 | 2.65 | 102 |
| 1999 | 2.36 | 96 |
| 1998 | 4.66 | 88 |
| 1997 | 8.44 | 57 |
| 1996 | 17.61 | 44 |
| 1995 | 24.98 | 41 |
| 1994 | 35.93 | 35 |
| 1993 | 108.77 | 15 |
| 1992 | 243.27 | 4 |