| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.94 | 116 |
| 2015 | 17.65 | 136 |
| 2014 | 17.27 | 143 |
| 2013 | 18.66 | 139 |
| 2012 | 18.44 | 139 |
| 2011 | 17.63 | 143 |
| 2010 | 16.17 | 151 |
| 2009 | 15.98 | 151 |
| 2008 | 18.17 | 142 |
| 2007 | 18.69 | 145 |
| 2006 | 18.42 | 142 |
| 2005 | 17.19 | 146 |
| 2004 | 17.15 | 151 |
| 2003 | 18.41 | 142 |
| 2002 | 18.39 | 139 |
| 2001 | 17.15 | 144 |
| 2000 | 18.32 | 138 |
| 1999 | 16.21 | 145 |
| 1998 | 16.86 | 142 |
| 1997 | 20.12 | 127 |
| 1996 | 21.06 | 121 |
| 1995 | 22.18 | 117 |
| 1994 | 21.23 | 108 |
| 1993 | 20.68 | 103 |
| 1992 | 23.77 | 91 |
| 1991 | 25.16 | 88 |
| 1990 | 22.53 | 91 |
| 1989 | 24.32 | 75 |
| 1988 | 21.55 | 81 |
| 1987 | 19.98 | 84 |
| 1986 | 19.87 | 79 |