| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 54.77 | 87 |
| 2015 | 56.2 | 90 |
| 2014 | 56.97 | 102 |
| 2013 | 56.7 | 104 |
| 2012 | 61.92 | 95 |
| 2011 | 64.64 | 95 |
| 2010 | 62.96 | 84 |
| 2009 | 58.34 | 88 |
| 2008 | 68.45 | 91 |
| 2007 | 66.02 | 86 |
| 2006 | 65.55 | 88 |
| 2005 | 62.37 | 88 |
| 2004 | 58.61 | 98 |
| 2003 | 56.07 | 93 |
| 2002 | 56.25 | 96 |
| 2001 | 57.87 | 88 |
| 2000 | 61.59 | 79 |
| 1999 | 56.66 | 85 |
| 1998 | 57.41 | 85 |
| 1997 | 56.09 | 84 |
| 1996 | 52.71 | 91 |
| 1995 | 55.09 | 84 |
| 1994 | 53.64 | 80 |
| 1993 | 44.13 | 92 |
| 1992 | 37.86 | 112 |
| 1991 | 38.91 | 96 |
| 1990 | 43.31 | 92 |
| 1989 | 46.78 | 84 |
| 1988 | 46.74 | 80 |
| 1987 | 47.23 | 76 |
| 1986 | 47.15 | 73 |