| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 32.4 | 189 |
| 2015 | 32.11 | 191 |
| 2014 | 31.86 | 191 |
| 2013 | 31.69 | 191 |
| 2012 | 31.56 | 191 |
| 2011 | 31.4 | 192 |
| 2010 | 31.17 | 192 |
| 2009 | 30.74 | 192 |
| 2008 | 30.25 | 192 |
| 2007 | 29.69 | 192 |
| 2006 | 29.03 | 192 |
| 2005 | 28.26 | 192 |
| 2004 | 27.53 | 192 |
| 2003 | 26.69 | 192 |
| 2002 | 25.8 | 190 |
| 2001 | 24.97 | 190 |
| 2000 | 24.28 | 186 |
| 1999 | 23.79 | 185 |
| 1998 | 23.46 | 186 |
| 1997 | 23.22 | 187 |
| 1996 | 22.97 | 187 |
| 1995 | 22.65 | 188 |
| 1994 | 22.51 | 185 |
| 1993 | 22.33 | 185 |
| 1992 | 22.1 | 186 |
| 1991 | 21.84 | 187 |
| 1990 | 21.55 | 187 |
| 1989 | 21.36 | 186 |
| 1988 | 21.13 | 185 |
| 1987 | 20.93 | 185 |
| 1986 | 20.85 | 186 |