| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.37 | 21 |
| 2015 | 5.24 | 42 |
| 2014 | 8.07 | 23 |
| 2013 | 7.99 | 29 |
| 2012 | 5.56 | 41 |
| 2011 | 8.39 | 29 |
| 2010 | 6.26 | 40 |
| 2009 | -3.19 | 136 |
| 2008 | 5.58 | 65 |
| 2007 | 5 | 56 |
| 2006 | 5.39 | 49 |
| 2005 | 4.41 | 56 |
| 2004 | 4.81 | 66 |
| 2003 | 6.26 | 41 |
| 2002 | 8.58 | 24 |
| 2001 | 8.02 | 35 |
| 2000 | 4.36 | 59 |
| 1999 | -6.48 | 147 |
| 1998 | 1.68 | 85 |
| 1997 | 0.79 | 93 |
| 1996 | 0.54 | 111 |
| 1995 | 6.47 | 35 |
| 1994 | -3.19 | 102 |
| 1993 | -9.74 | 123 |
| 1992 | 6.66 | 30 |
| 1991 | -9.51 | 115 |
| 1990 | 1.58 | 66 |
| 1989 | 3.78 | 51 |
| 1988 | 6.64 | 34 |
| 1987 | 9.82 | 15 |
| 1986 | 0.81 | 66 |