| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.27 | 125 |
| 2015 | 1.29 | 146 |
| 2014 | 1.37 | 150 |
| 2013 | 1.44 | 154 |
| 2012 | 1.54 | 152 |
| 2011 | 1.61 | 151 |
| 2010 | 1.43 | 154 |
| 2009 | 1.3 | 155 |
| 2008 | 1.51 | 153 |
| 2007 | 1.6 | 152 |
| 2006 | 1.47 | 155 |
| 2005 | 1.42 | 154 |
| 2004 | 1.67 | 156 |
| 2003 | 1.68 | 154 |
| 2002 | 1.76 | 154 |
| 2001 | 1.87 | 152 |
| 2000 | 1.85 | 151 |
| 1999 | 1.94 | 149 |
| 1998 | 2.02 | 149 |
| 1997 | 2.15 | 150 |
| 1996 | 2.23 | 148 |
| 1995 | 2.41 | 149 |
| 1994 | 2.67 | 132 |
| 1993 | 2.49 | 128 |
| 1992 | 2.77 | 124 |
| 1991 | 3.18 | 119 |
| 1990 | 3.5 | 115 |
| 1989 | 3.42 | 104 |
| 1988 | 3.46 | 102 |
| 1987 | 3.62 | 101 |
| 1986 | 3.66 | 96 |