| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.56 | 117 |
| 2015 | 17.54 | 137 |
| 2014 | 18.31 | 137 |
| 2013 | 17.73 | 144 |
| 2012 | 16.89 | 145 |
| 2011 | 16.9 | 146 |
| 2010 | 16.7 | 147 |
| 2009 | 16.63 | 147 |
| 2008 | 15.98 | 157 |
| 2007 | 18.04 | 148 |
| 2006 | 16.71 | 151 |
| 2005 | 18.45 | 139 |
| 2004 | 17.7 | 143 |
| 2003 | 17.03 | 150 |
| 2002 | 16.7 | 147 |
| 2001 | 16.49 | 148 |
| 2000 | 16.93 | 146 |
| 1999 | 16.21 | 146 |
| 1998 | 15.84 | 144 |
| 1997 | 15.63 | 143 |
| 1996 | 12.63 | 152 |
| 1995 | 19.25 | 130 |
| 1994 | 22.48 | 100 |
| 1993 | 22.45 | 98 |
| 1992 | 21.17 | 97 |
| 1991 | 19.6 | 104 |
| 1990 | 18.96 | 103 |
| 1989 | 19.66 | 89 |
| 1988 | 16.67 | 93 |
| 1987 | 17.13 | 90 |
| 1986 | 13.52 | 98 |