| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 23.17 | 160 |
| 2015 | 22.52 | 160 |
| 2014 | 21.81 | 159 |
| 2013 | 21.17 | 157 |
| 2012 | 20.62 | 158 |
| 2011 | 20.16 | 158 |
| 2010 | 19.8 | 159 |
| 2009 | 19.71 | 160 |
| 2008 | 19.76 | 161 |
| 2007 | 19.86 | 161 |
| 2006 | 19.85 | 161 |
| 2005 | 19.6 | 161 |
| 2004 | 19.19 | 159 |
| 2003 | 18.53 | 157 |
| 2002 | 17.69 | 152 |
| 2001 | 16.83 | 151 |
| 2000 | 16.03 | 149 |
| 1999 | 15.46 | 147 |
| 1998 | 14.94 | 146 |
| 1997 | 14.45 | 144 |
| 1996 | 13.94 | 142 |
| 1995 | 13.37 | 140 |
| 1994 | 12.53 | 136 |
| 1993 | 11.7 | 136 |
| 1992 | 10.9 | 133 |
| 1991 | 10.17 | 133 |
| 1990 | 9.51 | 127 |
| 1989 | 9.02 | 124 |
| 1988 | 8.63 | 121 |
| 1987 | 8.33 | 120 |
| 1986 | 8.12 | 117 |