| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 14.59 | 124 |
| 2015 | 15.44 | 145 |
| 2014 | 15.45 | 152 |
| 2013 | 15.73 | 157 |
| 2012 | 15.52 | 155 |
| 2011 | 15.45 | 157 |
| 2010 | 15.63 | 157 |
| 2009 | 16.37 | 150 |
| 2008 | 17.33 | 148 |
| 2007 | 17.09 | 153 |
| 2006 | 17.2 | 147 |
| 2005 | 17.7 | 141 |
| 2004 | 17.86 | 142 |
| 2003 | 18.15 | 145 |
| 2002 | 18.09 | 140 |
| 2001 | 17.79 | 140 |
| 2000 | 22.13 | 125 |
| 1999 | 21.81 | 124 |
| 1998 | 22.49 | 118 |
| 1997 | 22.86 | 116 |
| 1996 | 22.92 | 113 |
| 1995 | 22.75 | 113 |
| 1994 | 21.72 | 105 |
| 1993 | 20.66 | 104 |
| 1992 | 20.4 | 101 |
| 1991 | 17.36 | 114 |
| 1990 | 16.24 | 115 |
| 1989 | 16.54 | 101 |
| 1988 | 16.17 | 96 |
| 1987 | 15.83 | 96 |
| 1986 | 15.85 | 88 |