| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2013 | 48.97 | 12 |
| 2012 | 49.25 | 13 |
| 2011 | 52.7 | 13 |
| 2010 | 52.16 | 14 |
| 2009 | 44.17 | 15 |
| 2008 | 54.09 | 13 |
| 2007 | 53.31 | 12 |
| 2006 | 56.48 | 12 |
| 2005 | 57.8 | 11 |
| 2004 | 55.49 | 9 |
| 2003 | 51.59 | 10 |
| 2002 | 49.76 | 10 |
| 2001 | 46.08 | 14 |
| 2000 | 49.67 | 10 |
| 1999 | 45.55 | 10 |
| 1998 | 44.42 | 10 |
| 1997 | 50.83 | 6 |
| 1996 | 49.15 | 8 |
| 1995 | 41.27 | 17 |
| 1994 | 44.09 | 15 |
| 1993 | 51.58 | 5 |
| 1992 | 54.39 | 4 |
| 1991 | 56.4 | 4 |
| 1990 | 60.56 | 4 |
| 1989 | 57.08 | 6 |
| 1988 | 51.28 | 6 |
| 1987 | 50.28 | 6 |
| 1986 | 49.26 | 8 |