| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 11.438 | 44 |
| 2015 | 12.052 | 50 |
| 2014 | 13.538 | 39 |
| 2013 | 14.985 | 33 |
| 2012 | 11.994 | 57 |
| 2011 | 10.538 | 68 |
| 2010 | 13.32 | 45 |
| 2009 | 14.045 | 51 |
| 2008 | 13.169 | 60 |
| 2007 | 13.041 | 62 |
| 2006 | 11.576 | 72 |
| 2005 | 12.101 | 68 |
| 2004 | 13.491 | 60 |
| 2003 | 15.549 | 52 |
| 2002 | 18.295 | 41 |
| 2001 | 18.553 | 51 |
| 2000 | 18.143 | 56 |
| 1999 | 17.574 | 61 |
| 1998 | 21.628 | 50 |
| 1997 | 21.018 | 49 |
| 1996 | 20.716 | 55 |
| 1995 | 19.89 | 48 |
| 1994 | 20.139 | 41 |
| 1993 | 20.225 | 41 |
| 1992 | 19.318 | 39 |
| 1991 | 17.917 | 44 |
| 1990 | 22 | 23 |
| 1989 | 558.01 | 2 |
| 1988 | 121905.98 | 1 |