| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.466 | 18 |
| 2015 | 16.106 | 23 |
| 2014 | 15.743 | 28 |
| 2013 | 18.139 | 17 |
| 2012 | 19.237 | 14 |
| 2011 | 18.678 | 16 |
| 2010 | 18.977 | 19 |
| 2009 | 21.042 | 13 |
| 2008 | 23.673 | 10 |
| 2007 | 22.856 | 14 |
| 2006 | 23.933 | 14 |
| 2005 | 25.534 | 12 |
| 2004 | 24.675 | 15 |
| 2003 | 21.016 | 21 |
| 2002 | 20.765 | 31 |
| 2001 | 24.978 | 21 |
| 2000 | 29.996 | 19 |
| 1999 | 35.057 | 19 |
| 1998 | 32.627 | 21 |
| 1997 | 30.912 | 25 |
| 1996 | 31.533 | 29 |
| 1995 | 36.155 | 23 |
| 1994 | 55.348 | 12 |
| 1993 | 94.238 | 5 |
| 1992 | 173.804 | 3 |
| 1991 | 751.519 | 2 |
| 1990 | 4774.525 | 1 |
| 1989 | 1515.86 | 1 |
| 1988 | 174.278 | 2 |
| 1987 | 35.739 | 5 |
| 1986 | 40.52 | 4 |