| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 25.15 | 3 |
| 2015 | 40.96 | 4 |
| 2014 | -3.24 | 184 |
| 2013 | -25.05 | 187 |
| 2012 | 198.31 | 2 |
| 2011 | -43.46 | 187 |
| 2010 | 53.19 | 3 |
| 2009 | 10.91 | 23 |
| 2008 | 8.4 | 50 |
| 2007 | 9.53 | 47 |
| 2006 | 9.18 | 44 |
| 2005 | 6.21 | 47 |
| 2004 | 6.42 | 45 |
| 2003 | 6.23 | 36 |
| 2002 | 9.5 | 14 |
| 2001 | 8.94 | 19 |
| 2000 | 8.39 | 22 |
| 1999 | 7.66 | 29 |
| 1998 | 3.34 | 65 |
| 1997 | 5.7 | 29 |
| 1996 | 2.36 | 58 |
| 1995 | 2.47 | 56 |
| 1994 | 1.01 | 89 |
| 1993 | 1.27 | 71 |
| 1992 | 1.55 | 50 |
| 1991 | 1.42 | 48 |
| 1990 | 2.26 | 35 |
| 1989 | 1.53 | 39 |
| 1988 | 1.45 | 38 |
| 1987 | 1.4 | 37 |
| 1986 | 1.5 | 30 |