| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 32.32 | 180 |
| 2015 | 31.61 | 182 |
| 2014 | 30.9 | 181 |
| 2013 | 30.2 | 181 |
| 2012 | 29.49 | 181 |
| 2011 | 28.8 | 181 |
| 2010 | 28.11 | 182 |
| 2009 | 27.44 | 183 |
| 2008 | 26.78 | 184 |
| 2007 | 26.12 | 185 |
| 2006 | 25.48 | 185 |
| 2005 | 24.85 | 185 |
| 2004 | 24.22 | 185 |
| 2003 | 23.61 | 186 |
| 2002 | 23.04 | 187 |
| 2001 | 22.67 | 187 |
| 2000 | 22.31 | 188 |
| 1999 | 21.95 | 188 |
| 1998 | 21.59 | 189 |
| 1997 | 21.24 | 190 |
| 1996 | 20.89 | 190 |
| 1995 | 20.54 | 189 |
| 1994 | 20.2 | 189 |
| 1993 | 19.87 | 189 |
| 1992 | 19.54 | 189 |
| 1991 | 19.21 | 189 |
| 1990 | 18.88 | 189 |
| 1989 | 18.57 | 188 |
| 1988 | 18.22 | 188 |
| 1987 | 17.73 | 188 |
| 1986 | 17.24 | 189 |