| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 58.68 | 58 |
| 2015 | 58.86 | 57 |
| 2014 | 59.02 | 57 |
| 2013 | 58.12 | 62 |
| 2012 | 57.97 | 63 |
| 2011 | 56.83 | 66 |
| 2010 | 57.09 | 66 |
| 2009 | 57.09 | 66 |
| 2008 | 56.06 | 69 |
| 2007 | 56.13 | 68 |
| 2006 | 55.69 | 70 |
| 2005 | 55.43 | 69 |
| 2004 | 54.94 | 71 |
| 2003 | 54.5 | 73 |
| 2002 | 53.48 | 79 |
| 2001 | 53.9 | 75 |
| 2000 | 53.5 | 76 |
| 1999 | 52.65 | 78 |
| 1998 | 51.42 | 85 |
| 1997 | 51.35 | 84 |
| 1996 | 51.33 | 84 |
| 1995 | 51.54 | 82 |
| 1994 | 50.82 | 85 |
| 1993 | 49.5 | 89 |
| 1992 | 48.7 | 89 |
| 1991 | 47.36 | 96 |
| 1990 | 46.76 | 96 |