| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 21.92 | 20 |
| 2015 | 22.21 | 24 |
| 2014 | 22.25 | 25 |
| 2013 | 22.36 | 28 |
| 2012 | 22.47 | 28 |
| 2011 | 22.49 | 28 |
| 2010 | 22.36 | 25 |
| 2009 | 22.44 | 24 |
| 2008 | 22.45 | 20 |
| 2007 | 22.42 | 20 |
| 2006 | 22.41 | 16 |
| 2005 | 22.46 | 15 |
| 2004 | 22.45 | 12 |
| 2003 | 22.42 | 10 |
| 2002 | 22.43 | 8 |
| 2001 | 22.5 | 6 |
| 2000 | 22.67 | 5 |
| 1999 | 23.06 | 4 |
| 1998 | 23.58 | 5 |
| 1997 | 24.17 | 5 |
| 1996 | 24.75 | 5 |
| 1995 | 25.23 | 6 |
| 1994 | 26.11 | 8 |
| 1993 | 26.96 | 12 |
| 1992 | 27.79 | 12 |
| 1991 | 28.66 | 13 |
| 1990 | 29.63 | 18 |
| 1989 | 30.57 | 20 |
| 1988 | 31.49 | 20 |
| 1987 | 32.36 | 24 |
| 1986 | 33.18 | 25 |