| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 7.27 | 18 |
| 2015 | 10.13 | 14 |
| 2014 | 7.39 | 23 |
| 2013 | 8.08 | 21 |
| 2012 | 22.77 | 6 |
| 2011 | 33.22 | 3 |
| 2010 | 8.14 | 26 |
| 2009 | 8.47 | 28 |
| 2008 | 44.39 | 1 |
| 2007 | 17.24 | 6 |
| 2006 | 12.31 | 15 |
| 2005 | 12.94 | 20 |
| 2004 | 3.26 | 94 |
| 2003 | 17.76 | 14 |
| 2002 | 1.65 | 131 |
| 2001 | -8.24 | 168 |
| 2000 | 0.66 | 143 |
| 1999 | 7.94 | 40 |
| 1998 | 0.89 | 143 |
| 1997 | 2.4 | 121 |
| 1996 | -8.48 | 163 |
| 1995 | 10.02 | 74 |
| 1994 | 7.59 | 92 |
| 1993 | 3.54 | 106 |
| 1992 | 10.53 | 57 |
| 1991 | 35.72 | 21 |
| 1990 | 5.15 | 93 |
| 1989 | 7.82 | 64 |
| 1988 | 7.08 | 70 |
| 1987 | -2.43 | 122 |
| 1986 | -9.81 | 125 |