| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 44.8 | 128 |
| 2015 | 45.01 | 157 |
| 2014 | 46.79 | 165 |
| 2013 | 49.78 | 160 |
| 2012 | 52.62 | 158 |
| 2011 | 55.99 | 155 |
| 2010 | 51.67 | 158 |
| 2009 | 48.11 | 160 |
| 2008 | 58.43 | 149 |
| 2007 | 55.69 | 156 |
| 2006 | 51.79 | 162 |
| 2005 | 47.36 | 165 |
| 2004 | 41.94 | 170 |
| 2003 | 37.62 | 173 |
| 2002 | 35.25 | 173 |
| 2001 | 35.06 | 167 |
| 2000 | 35.54 | 163 |
| 1999 | 33.21 | 167 |
| 1998 | 32.95 | 166 |
| 1997 | 33.47 | 167 |
| 1996 | 31.65 | 169 |
| 1995 | 30.93 | 167 |
| 1994 | 28.92 | 162 |
| 1993 | 28.5 | 154 |
| 1992 | 27.84 | 155 |
| 1991 | 26.41 | 154 |
| 1990 | 29.47 | 147 |
| 1989 | 22.54 | 136 |
| 1988 | 33.22 | 123 |
| 1987 | 27.35 | 125 |
| 1986 | 34.52 | 111 |