| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 0.6 | 120 |
| 2015 | 0.5 | 127 |
| 2014 | 0.1 | 137 |
| 2013 | 0 | 149 |
| 2012 | 3.7 | 98 |
| 2011 | 4.2 | 100 |
| 2010 | 4.1 | 100 |
| 1999 | 2.6 | 122 |
| 1998 | 2.5 | 128 |
| 1997 | 44.3 | 68 |
| 1996 | 25.8 | 77 |
| 1995 | 24.6 | 79 |
| 1994 | 21 | 82 |
| 1993 | 21 | 80 |
| 1992 | 19.2 | 79 |
| 1991 | 9.2 | 97 |
| 1990 | 9 | 102 |
| 1989 | 23.4 | 69 |
| 1988 | 11.9 | 96 |
| 1987 | 11.4 | 94 |
| 1986 | 7.2 | 103 |