| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.03 | 135 |
| 2015 | 15.75 | 135 |
| 2014 | 15.64 | 136 |
| 2013 | 15.55 | 136 |
| 2012 | 15.51 | 136 |
| 2011 | 15.59 | 139 |
| 2010 | 15.81 | 139 |
| 2009 | 16.16 | 142 |
| 2008 | 16.7 | 145 |
| 2007 | 17.29 | 148 |
| 2006 | 17.72 | 150 |
| 2005 | 17.86 | 150 |
| 2004 | 17.79 | 151 |
| 2003 | 17.37 | 151 |
| 2002 | 16.74 | 150 |
| 2001 | 16.11 | 147 |
| 2000 | 15.61 | 146 |
| 1999 | 15.13 | 144 |
| 1998 | 14.78 | 143 |
| 1997 | 14.47 | 145 |
| 1996 | 14.05 | 143 |
| 1995 | 13.44 | 142 |
| 1994 | 12.51 | 135 |
| 1993 | 11.48 | 135 |
| 1992 | 10.44 | 132 |
| 1991 | 9.51 | 124 |
| 1990 | 8.76 | 122 |
| 1989 | 8.43 | 118 |
| 1988 | 8.25 | 118 |
| 1987 | 8.21 | 117 |
| 1986 | 8.26 | 120 |