| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 63.22 | 101 |
| 2015 | 63.91 | 122 |
| 2014 | 62.92 | 134 |
| 2013 | 61.18 | 142 |
| 2012 | 59.93 | 145 |
| 2011 | 58.09 | 151 |
| 2010 | 52.34 | 156 |
| 2009 | 46.5 | 164 |
| 2008 | 55.76 | 159 |
| 2007 | 57.41 | 149 |
| 2006 | 55.66 | 152 |
| 2005 | 54.34 | 152 |
| 2004 | 54.21 | 150 |
| 2003 | 53.11 | 146 |
| 2002 | 54.98 | 142 |
| 2001 | 58.07 | 131 |
| 2000 | 60.24 | 123 |
| 1999 | 54.74 | 122 |
| 1998 | 52.86 | 125 |
| 1997 | 51.29 | 131 |
| 1996 | 46.33 | 142 |
| 1995 | 44.83 | 144 |
| 1994 | 41.7 | 142 |
| 1993 | 36.99 | 145 |
| 1992 | 36.01 | 141 |
| 1991 | 35.51 | 141 |
| 1990 | 35.64 | 141 |
| 1989 | 37.42 | 122 |
| 1988 | 36.75 | 116 |
| 1987 | 36.36 | 113 |
| 1986 | 35.4 | 109 |