| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.21 | 5 |
| 2015 | 54.67 | 4 |
| 2014 | 69.42 | 3 |
| 2013 | 72.02 | 3 |
| 2012 | 74.77 | 3 |
| 2011 | 76.63 | 3 |
| 2010 | 75.38 | 3 |
| 2009 | 71.12 | 4 |
| 2008 | 77.41 | 4 |
| 2007 | 73.24 | 5 |
| 2006 | 75.5 | 5 |
| 2005 | 71.88 | 4 |
| 2004 | 65.86 | 5 |
| 2003 | 61.17 | 5 |
| 2002 | 63.32 | 4 |
| 2001 | 65.49 | 3 |
| 2000 | 72.15 | 3 |
| 1999 | 61.27 | 3 |
| 1998 | 46.06 | 6 |
| 1997 | 56.86 | 3 |
| 1996 | 51.84 | 6 |
| 1995 | 44.87 | 12 |
| 1994 | 45.48 | 13 |
| 1993 | 35.3 | 37 |
| 1992 | 35.51 | 41 |
| 1991 | 36.03 | 39 |
| 1990 | 40.64 | 25 |
| 1989 | 37.98 | 27 |
| 1988 | 29.92 | 52 |
| 1987 | 35.79 | 32 |
| 1986 | 32.65 | 39 |