| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.38 | 125 |
| 2015 | 1.4 | 118 |
| 2014 | 1.43 | 115 |
| 2013 | 1.46 | 116 |
| 2012 | 1.49 | 117 |
| 2011 | 1.53 | 115 |
| 2010 | 1.58 | 116 |
| 2009 | 1.62 | 116 |
| 2008 | 1.66 | 118 |
| 2007 | 1.69 | 115 |
| 2006 | 1.73 | 116 |
| 2005 | 1.77 | 112 |
| 2004 | 1.81 | 106 |
| 2003 | 1.84 | 110 |
| 2002 | 1.98 | 108 |
| 2001 | 2.23 | 99 |
| 2000 | 2.27 | 94 |
| 1999 | 2.32 | 92 |
| 1998 | 2.37 | 92 |
| 1997 | 2.42 | 93 |
| 1996 | 2.48 | 90 |
| 1995 | 2.54 | 88 |
| 1994 | 2.6 | 90 |
| 1993 | 2.66 | 91 |
| 1992 | 2.74 | 89 |
| 1991 | 2.83 | 93 |
| 1990 | 2.95 | 92 |
| 1989 | 3.04 | 92 |
| 1988 | 3.11 | 93 |
| 1987 | 3.16 | 95 |
| 1986 | 3.2 | 94 |