| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 59.6 | 1 |
| 2015 | -49.3 | 169 |
| 2014 | -2 | 151 |
| 2013 | 12.19 | 18 |
| 2012 | -6.9 | 150 |
| 2011 | 16.27 | 5 |
| 2010 | 13.51 | 13 |
| 2009 | 3.56 | 65 |
| 2008 | -13.9 | 168 |
| 2007 | -27.7 | 173 |
| 2006 | 4.32 | 63 |
| 2005 | 31.35 | 3 |
| 2004 | 17.44 | 12 |
| 2003 | -29.13 | 169 |
| 2002 | 16.98 | 6 |
| 2001 | 1.2 | 94 |
| 2000 | -11.55 | 149 |
| 1999 | 15.94 | 8 |
| 1998 | 8.26 | 27 |
| 1997 | -8.1 | 144 |
| 1996 | 7.4 | 31 |
| 1995 | 11.95 | 15 |
| 1994 | 7.12 | 28 |
| 1993 | -1.12 | 89 |
| 1992 | 22.75 | 7 |
| 1991 | -16.55 | 121 |
| 1990 | 10.87 | 15 |
| 1989 | 9.72 | 14 |
| 1988 | 7.69 | 31 |
| 1987 | -8.34 | 97 |
| 1986 | -4.3 | 98 |