| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.83 | 32 |
| 2015 | 5.16 | 15 |
| 2014 | 3.33 | 29 |
| 2013 | -1.92 | 142 |
| 2012 | 3.59 | 49 |
| 2011 | 2.61 | 69 |
| 2010 | 2.07 | 84 |
| 2009 | -3.91 | 124 |
| 2008 | 4.08 | 56 |
| 2007 | 13.46 | 15 |
| 2006 | 9.45 | 22 |
| 2005 | 8.27 | 30 |
| 2004 | 10.27 | 19 |
| 2003 | 7.24 | 24 |
| 2002 | 8.14 | 21 |
| 2001 | 9.89 | 9 |
| 2000 | 8.46 | 13 |
| 1999 | 4.07 | 39 |
| 1998 | 2.51 | 68 |
| 1997 | -16.95 | 125 |
| 1996 | 3.42 | 58 |
| 1995 | -2.47 | 104 |
| 1994 | -4.07 | 93 |
| 1993 | -2.12 | 82 |
| 1992 | -1.35 | 73 |
| 1991 | -24.3 | 106 |
| 1990 | 7.62 | 11 |
| 1989 | -2.68 | 75 |
| 1988 | 6.44 | 18 |
| 1987 | 5.56 | 16 |
| 1986 | 1.93 | 49 |