| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 64.453 | 49 |
| 2015 | 63.946 | 68 |
| 2014 | 62.236 | 74 |
| 2013 | 63.127 | 77 |
| 2012 | 61.924 | 79 |
| 2011 | 59.634 | 92 |
| 2010 | 58.598 | 98 |
| 2009 | 57.284 | 104 |
| 2008 | 49.513 | 123 |
| 2007 | 45.327 | 140 |
| 2006 | 47.391 | 127 |
| 2005 | 52.738 | 115 |
| 2004 | 54.002 | 108 |
| 1999 | 57.144 | 82 |
| 1998 | 54.213 | 90 |
| 1997 | 55.511 | 83 |
| 1996 | 52.339 | 88 |
| 1995 | 55.688 | 75 |
| 1994 | 48.642 | 89 |
| 1993 | 51.613 | 65 |
| 1992 | 51.724 | 63 |
| 1991 | 47.316 | 75 |
| 1990 | 50.416 | 59 |
| 1989 | 49.978 | 50 |
| 1988 | 50.399 | 49 |
| 1987 | 53.141 | 41 |
| 1986 | 50.903 | 52 |