| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.83 | 87 |
| 2015 | 1.68 | 130 |
| 2014 | -1.53 | 187 |
| 2013 | -5.95 | 195 |
| 2012 | -3.16 | 189 |
| 2011 | 0.32 | 171 |
| 2010 | 1.32 | 163 |
| 2009 | -1.77 | 127 |
| 2008 | 3.86 | 98 |
| 2007 | 4.82 | 121 |
| 2006 | 4.51 | 132 |
| 2005 | 3.72 | 126 |
| 2004 | 4.57 | 115 |
| 2003 | 2.48 | 139 |
| 2002 | 3.4 | 98 |
| 2001 | 3.6 | 86 |
| 2000 | 5.72 | 58 |
| 1999 | 4.83 | 52 |
| 1998 | 5.24 | 51 |
| 1997 | 2.57 | 139 |
| 1996 | 1.33 | 161 |
| 1995 | 8.47 | 18 |
| 1994 | 5.9 | 46 |
| 1993 | 0.7 | 120 |
| 1992 | 9.4 | 15 |
| 1991 | 0.74 | 114 |
| 1990 | 7.4 | 24 |
| 1989 | 7.95 | 22 |
| 1988 | 8.65 | 26 |
| 1987 | 7.07 | 36 |
| 1986 | 3.7 | 75 |