| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.737 | 51 |
| 2015 | 2.561 | 106 |
| 2014 | 6.986 | 26 |
| 2013 | 12.282 | 3 |
| 2012 | 2.646 | 120 |
| 2011 | 9.38 | 13 |
| 2010 | 0.52 | 155 |
| 2009 | 0.541 | 100 |
| 2008 | 14.136 | 6 |
| 2007 | 15.908 | 11 |
| 2006 | 9.065 | 38 |
| 2005 | 10.434 | 20 |
| 2004 | 13.814 | 11 |
| 2003 | 10.274 | 14 |
| 2002 | 0.624 | 140 |
| 2001 | 2.779 | 100 |
| 2000 | 7.674 | 28 |
| 1999 | 1.294 | 121 |
| 1998 | 3.545 | 90 |
| 1997 | 1.235 | 132 |
| 1996 | -.238 | 134 |
| 1995 | -5.436 | 123 |
| 1994 | -19.05 | 130 |
| 1993 | -15.889 | 125 |
| 1992 | -9.168 | 122 |
| 1991 | -8.354 | 120 |
| 1990 | 40.859 | 1 |
| 1989 | 0.868 | 83 |
| 1988 | 10.471 | 13 |