| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 15.96 | 119 |
| 2015 | 16.01 | 141 |
| 2014 | 15.73 | 149 |
| 2013 | 15.86 | 154 |
| 2012 | 16.25 | 150 |
| 2011 | 16.74 | 149 |
| 2010 | 16.4 | 148 |
| 2009 | 16.53 | 149 |
| 2008 | 17.33 | 147 |
| 2007 | 20.07 | 137 |
| 2006 | 18.17 | 144 |
| 2005 | 16.76 | 148 |
| 2004 | 17.44 | 148 |
| 2003 | 19.31 | 140 |
| 2002 | 17.71 | 143 |
| 2001 | 16.69 | 147 |
| 2000 | 17.92 | 139 |
| 1999 | 18.23 | 138 |
| 1998 | 18.28 | 136 |
| 1997 | 18.08 | 136 |
| 1996 | 19.34 | 128 |
| 1995 | 19.65 | 128 |
| 1994 | 21.69 | 106 |
| 1993 | 24.11 | 93 |
| 1992 | 31.53 | 56 |
| 1991 | 26.91 | 79 |
| 1990 | 28.89 | 70 |
| 1989 | 27.91 | 63 |
| 1988 | 23.97 | 73 |
| 1987 | 24.9 | 71 |
| 1986 | 21.51 | 73 |