| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.19 | 142 |
| 2015 | 1.07 | 152 |
| 2014 | 0.95 | 157 |
| 2013 | 0.58 | 163 |
| 2012 | 0.18 | 157 |
| 2011 | 2.08 | 137 |
| 2010 | 1.97 | 147 |
| 2009 | -2.94 | 139 |
| 2008 | 0.2 | 173 |
| 2007 | 2.36 | 167 |
| 2006 | 2.37 | 171 |
| 2005 | 1.61 | 178 |
| 2004 | 2.79 | 156 |
| 2003 | 0.82 | 166 |
| 2002 | 1.12 | 146 |
| 2001 | 1.95 | 131 |
| 2000 | 3.88 | 112 |
| 1999 | 3.41 | 94 |
| 1998 | 3.56 | 109 |
| 1997 | 2.34 | 142 |
| 1996 | 1.39 | 160 |
| 1995 | 2.09 | 140 |
| 1994 | 2.35 | 120 |
| 1993 | -.61 | 137 |
| 1992 | 1.6 | 96 |
| 1991 | 1.04 | 109 |
| 1990 | 2.91 | 92 |
| 1989 | 4.35 | 66 |
| 1988 | 4.73 | 80 |
| 1987 | 2.58 | 98 |
| 1986 | 2.35 | 103 |