| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 56.09 | 115 |
| 2015 | 59.47 | 133 |
| 2014 | 65.14 | 128 |
| 2013 | 64.97 | 133 |
| 2012 | 68.27 | 130 |
| 2011 | 72.21 | 124 |
| 2010 | 69.06 | 123 |
| 2009 | 66.34 | 124 |
| 2008 | 80.79 | 112 |
| 2007 | 76.41 | 118 |
| 2006 | 73.1 | 121 |
| 2005 | 71.62 | 117 |
| 2004 | 69.73 | 124 |
| 2003 | 66.32 | 121 |
| 2002 | 63.39 | 121 |
| 2001 | 63.14 | 120 |
| 2000 | 59.32 | 125 |
| 1999 | 55.35 | 121 |
| 1998 | 54.32 | 121 |
| 1997 | 54.95 | 126 |
| 1996 | 54.77 | 118 |
| 1995 | 54.97 | 125 |
| 1994 | 53.22 | 112 |
| 1993 | 53.61 | 108 |
| 1992 | 56.25 | 101 |
| 1991 | 58.09 | 91 |
| 1990 | 61.75 | 82 |
| 1989 | 62.97 | 73 |
| 1988 | 58.45 | 72 |
| 1987 | 54.19 | 75 |
| 1986 | 52.05 | 78 |