| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1 | 84 |
| 2015 | 4.36 | 52 |
| 2014 | 4.3 | 50 |
| 2013 | 5.81 | 42 |
| 2012 | 5.43 | 55 |
| 2011 | 14.16 | 13 |
| 2010 | 2.76 | 72 |
| 2009 | 4.94 | 72 |
| 2008 | 6.87 | 45 |
| 2007 | 7.33 | 42 |
| 2006 | 5.49 | 60 |
| 2005 | 6.5 | 45 |
| 2004 | 7.64 | 29 |
| 2003 | 8.61 | 21 |
| 2002 | 11.89 | 18 |
| 2001 | 15.7 | 11 |
| 2000 | 1.63 | 87 |
| 1999 | 17.08 | 9 |
| 1998 | -8.89 | 128 |
| 1997 | 5.68 | 35 |
| 1996 | 0.73 | 93 |
| 1995 | 6.06 | 26 |
| 1994 | 7.87 | 19 |
| 1993 | 8.43 | 20 |
| 1992 | 4.93 | 36 |
| 1991 | 11.74 | 14 |
| 1990 | 5.88 | 22 |
| 1989 | 3.72 | 43 |
| 1988 | 7.35 | 16 |
| 1987 | 1.47 | 57 |
| 1986 | 1.26 | 70 |