| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 58.31 | 6 |
| 2015 | 52.86 | 14 |
| 2014 | 54.69 | 14 |
| 2013 | 54.61 | 16 |
| 2012 | 55.77 | 17 |
| 2011 | 49.28 | 19 |
| 2010 | 48.97 | 19 |
| 2009 | 47.49 | 20 |
| 2008 | 54.45 | 19 |
| 2007 | 52.7 | 16 |
| 2006 | 58.27 | 13 |
| 2005 | 50.54 | 17 |
| 2004 | 48.89 | 16 |
| 2003 | 48.93 | 14 |
| 2002 | 48 | 13 |
| 2001 | 45.38 | 13 |
| 2000 | 38.51 | 25 |
| 1999 | 38.65 | 26 |
| 1998 | 35.54 | 27 |
| 1997 | 34.2 | 29 |
| 1996 | 30.73 | 30 |
| 1995 | 26.59 | 33 |
| 1994 | 20.57 | 50 |
| 1993 | 14.58 | 72 |
| 1992 | 18.52 | 51 |
| 1991 | 17.73 | 45 |
| 1990 | 22.11 | 33 |
| 1989 | 21.32 | 38 |
| 1988 | 17.83 | 47 |
| 1987 | 19.61 | 41 |
| 1986 | 25.72 | 31 |