| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.85 | 26 |
| 2015 | 3.62 | 39 |
| 2014 | 4 | 20 |
| 2013 | 4.16 | 41 |
| 2012 | 4.17 | 44 |
| 2011 | 3.7 | 49 |
| 2010 | 3.36 | 55 |
| 2009 | 3.47 | 28 |
| 2008 | 3.92 | 58 |
| 2007 | 3.59 | 75 |
| 2006 | 1.77 | 95 |
| 2005 | 2.53 | 95 |
| 2004 | 3.53 | 73 |
| 2003 | 2.46 | 69 |
| 2002 | 2.4 | 66 |
| 2001 | 2.06 | 62 |
| 2000 | 0.18 | 96 |
| 1999 | 3.18 | 44 |
| 1998 | -7.49 | 122 |
| 1997 | 6.27 | 24 |
| 1996 | 8.1 | 21 |
| 1995 | 10.86 | 13 |
| 1994 | 6.12 | 18 |
| 1993 | 4.1 | 30 |
| 1992 | 1.13 | 56 |
| 1991 | 5.45 | 25 |
| 1990 | 7.94 | 10 |
| 1989 | 2.26 | 45 |
| 1988 | 1.94 | 51 |
| 1987 | 1.3 | 50 |
| 1986 | 0.13 | 59 |