| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 58.453 | 100 |
| 2014 | 52.478 | 118 |
| 2013 | 50.394 | 133 |
| 2012 | 51.189 | 126 |
| 2011 | 48.8 | 134 |
| 2010 | 53.682 | 111 |
| 1995 | 59.189 | 59 |
| 1994 | 61.715 | 41 |
| 1993 | 61.204 | 40 |
| 1992 | 61.879 | 39 |
| 1991 | 59.253 | 40 |
| 1990 | 53.316 | 48 |
| 1989 | 56.376 | 31 |
| 1988 | 56.801 | 29 |
| 1987 | 54.632 | 37 |
| 1986 | 55.108 | 34 |