| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 20.55 | 146 |
| 2015 | 19.92 | 146 |
| 2014 | 19.38 | 146 |
| 2013 | 18.93 | 147 |
| 2012 | 18.55 | 148 |
| 2011 | 18.18 | 148 |
| 2010 | 17.8 | 148 |
| 2009 | 17.38 | 148 |
| 2008 | 16.95 | 148 |
| 2007 | 16.53 | 145 |
| 2006 | 16.12 | 143 |
| 2005 | 15.73 | 142 |
| 2004 | 15.43 | 143 |
| 2003 | 15.15 | 141 |
| 2002 | 14.89 | 141 |
| 2001 | 14.63 | 141 |
| 2000 | 14.39 | 141 |
| 1999 | 14.19 | 141 |
| 1998 | 14.01 | 139 |
| 1997 | 13.85 | 140 |
| 1996 | 13.68 | 140 |
| 1995 | 13.51 | 143 |
| 1994 | 13.39 | 142 |
| 1993 | 13.27 | 141 |
| 1992 | 13.16 | 143 |
| 1991 | 13.07 | 144 |
| 1990 | 13.01 | 145 |
| 1989 | 12.99 | 145 |
| 1988 | 13.01 | 146 |
| 1987 | 13.05 | 146 |
| 1986 | 13.1 | 146 |