| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.54 | 129 |
| 2015 | 52.53 | 129 |
| 2014 | 54.52 | 132 |
| 2013 | 56.75 | 133 |
| 2012 | 59.14 | 135 |
| 2011 | 61.51 | 138 |
| 2010 | 63.74 | 140 |
| 2009 | 65.24 | 142 |
| 2008 | 66.6 | 142 |
| 2007 | 67.91 | 146 |
| 2006 | 69.28 | 145 |
| 2005 | 70.75 | 145 |
| 2004 | 71.57 | 145 |
| 2003 | 72.31 | 143 |
| 2002 | 72.99 | 142 |
| 2001 | 73.62 | 141 |
| 2000 | 74.2 | 137 |
| 1999 | 74.76 | 135 |
| 1998 | 75.16 | 131 |
| 1997 | 75.46 | 130 |
| 1996 | 75.69 | 129 |
| 1995 | 75.87 | 128 |
| 1994 | 76.66 | 128 |
| 1993 | 77.37 | 126 |
| 1992 | 77.95 | 125 |
| 1991 | 78.35 | 125 |
| 1990 | 78.52 | 125 |
| 1989 | 78.47 | 123 |
| 1988 | 78.27 | 122 |
| 1987 | 77.94 | 121 |
| 1986 | 77.46 | 119 |