| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 56.51 | 72 |
| 2015 | 56.64 | 71 |
| 2014 | 56.65 | 71 |
| 2013 | 56.7 | 68 |
| 2012 | 56.97 | 67 |
| 2011 | 56.92 | 65 |
| 2010 | 56.49 | 68 |
| 2009 | 57.04 | 68 |
| 2008 | 57 | 67 |
| 2007 | 57.11 | 67 |
| 2006 | 56.53 | 69 |
| 2005 | 56.2 | 66 |
| 2004 | 55.63 | 68 |
| 2003 | 55 | 70 |
| 2002 | 53.85 | 76 |
| 2001 | 52.84 | 83 |
| 2000 | 54.1 | 74 |
| 1999 | 53.96 | 73 |
| 1998 | 50.01 | 91 |
| 1997 | 50.76 | 86 |
| 1996 | 51.78 | 80 |
| 1995 | 52.65 | 78 |
| 1994 | 52.75 | 76 |
| 1993 | 55.02 | 66 |
| 1992 | 57.1 | 60 |
| 1991 | 58.37 | 51 |
| 1990 | 59.51 | 50 |