| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 18.92 | 143 |
| 2015 | 18.42 | 143 |
| 2014 | 18.01 | 143 |
| 2013 | 17.62 | 143 |
| 2012 | 17.26 | 143 |
| 2011 | 16.98 | 144 |
| 2010 | 16.77 | 145 |
| 2009 | 16.45 | 145 |
| 2008 | 16.26 | 143 |
| 2007 | 16.18 | 143 |
| 2006 | 16.15 | 145 |
| 2005 | 16.13 | 146 |
| 2004 | 16.14 | 146 |
| 2003 | 16.15 | 146 |
| 2002 | 16.16 | 147 |
| 2001 | 16.17 | 148 |
| 2000 | 16.18 | 150 |
| 1999 | 16.1 | 150 |
| 1998 | 16.03 | 150 |
| 1997 | 15.98 | 150 |
| 1996 | 15.94 | 150 |
| 1995 | 15.91 | 150 |
| 1994 | 15.63 | 149 |
| 1993 | 15.39 | 148 |
| 1992 | 15.19 | 147 |
| 1991 | 15.02 | 150 |
| 1990 | 14.88 | 150 |
| 1989 | 14.86 | 148 |
| 1988 | 14.81 | 152 |
| 1987 | 14.76 | 153 |
| 1986 | 14.72 | 155 |