| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 52.447 | 97 |
| 2015 | 55.403 | 109 |
| 2014 | 57.548 | 102 |
| 2013 | 54.234 | 113 |
| 2012 | 52.39 | 119 |
| 2011 | 54.476 | 107 |
| 2010 | 56.294 | 104 |
| 2009 | 55.238 | 110 |
| 2008 | 53.038 | 112 |
| 2007 | 55.965 | 101 |
| 2006 | 55.973 | 98 |
| 2005 | 45.429 | 134 |
| 2004 | 41.726 | 145 |
| 2003 | 41.372 | 145 |
| 2002 | 40.593 | 144 |
| 2001 | 40.775 | 144 |
| 2000 | 39.877 | 141 |
| 1999 | 35.384 | 149 |
| 1998 | 34.607 | 151 |
| 1997 | 30.815 | 152 |
| 1996 | 27.304 | 154 |
| 1995 | 26.124 | 151 |
| 1994 | 26.349 | 136 |
| 1993 | 28.105 | 126 |
| 1992 | 30.23 | 118 |
| 1991 | 29.612 | 118 |
| 1990 | 37.039 | 98 |
| 1989 | 30.637 | 102 |
| 1988 | 44.389 | 71 |
| 1987 | 39.94 | 82 |
| 1986 | 46.217 | 66 |