| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 62.57 | 102 |
| 2015 | 63.6 | 124 |
| 2014 | 65.32 | 127 |
| 2013 | 67.34 | 130 |
| 2012 | 62.68 | 136 |
| 2011 | 58.15 | 150 |
| 2010 | 48.87 | 163 |
| 2009 | 40.42 | 174 |
| 2008 | 36.31 | 181 |
| 2007 | 35.42 | 183 |
| 2006 | 36.78 | 182 |
| 2005 | 35.54 | 180 |
| 2004 | 37.13 | 175 |
| 2003 | 30.73 | 181 |
| 2002 | 30.87 | 176 |
| 2001 | 32.37 | 170 |
| 2000 | 34.51 | 164 |
| 1999 | 33.69 | 165 |
| 1998 | 40.94 | 155 |
| 1997 | 37.42 | 160 |
| 1996 | 38.18 | 160 |
| 1995 | 40.75 | 155 |
| 1994 | 39.23 | 150 |
| 1993 | 29.63 | 152 |
| 1992 | 28.37 | 154 |
| 1991 | 33.8 | 147 |
| 1990 | 35.42 | 142 |
| 1989 | 32.39 | 129 |
| 1988 | 38.13 | 112 |
| 1987 | 39.44 | 106 |
| 1986 | 37.96 | 103 |