| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.64 | 114 |
| 2015 | 1.68 | 110 |
| 2014 | 1.72 | 105 |
| 2013 | 1.76 | 101 |
| 2012 | 1.82 | 102 |
| 2011 | 1.87 | 100 |
| 2010 | 1.94 | 98 |
| 2009 | 2 | 99 |
| 2008 | 2.01 | 100 |
| 2007 | 1.97 | 105 |
| 2006 | 1.89 | 111 |
| 2005 | 1.78 | 111 |
| 2004 | 1.69 | 117 |
| 2003 | 1.64 | 121 |
| 2002 | 1.67 | 121 |
| 2001 | 1.75 | 119 |
| 2000 | 1.78 | 111 |
| 1999 | 1.83 | 105 |
| 1998 | 1.92 | 105 |
| 1997 | 2 | 106 |
| 1996 | 2.14 | 102 |
| 1995 | 2.34 | 98 |
| 1994 | 2.44 | 97 |
| 1993 | 2.51 | 98 |
| 1992 | 2.54 | 99 |
| 1991 | 2.54 | 107 |
| 1990 | 2.61 | 100 |
| 1989 | 2.65 | 107 |
| 1988 | 2.66 | 107 |
| 1987 | 2.69 | 112 |
| 1986 | 2.75 | 110 |