| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.34 | 123 |
| 2015 | 1.27 | 147 |
| 2014 | 1.29 | 154 |
| 2013 | 1.36 | 157 |
| 2012 | 1.5 | 153 |
| 2011 | 1.6 | 152 |
| 2010 | 1.66 | 150 |
| 2009 | 1.7 | 147 |
| 2008 | 1.39 | 155 |
| 2007 | 1.98 | 148 |
| 2006 | 2.23 | 146 |
| 2005 | 2.23 | 145 |
| 2004 | 2.32 | 147 |
| 2003 | 2.36 | 146 |
| 2002 | 2.5 | 145 |
| 2001 | 2.58 | 144 |
| 2000 | 2.23 | 148 |
| 1999 | 2.57 | 140 |
| 1998 | 2.74 | 141 |
| 1997 | 2.78 | 145 |
| 1996 | 2.79 | 144 |
| 1995 | 2.8 | 145 |
| 1994 | 2.8 | 128 |
| 1993 | 3.01 | 122 |
| 1992 | 3.05 | 120 |
| 1991 | 3.3 | 116 |
| 1990 | 3.47 | 116 |
| 1989 | 3.76 | 102 |
| 1988 | 3.91 | 99 |
| 1987 | 4.31 | 96 |
| 1986 | 4.39 | 93 |