| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 29 | 72 |
| 2015 | 33.1 | 70 |
| 2014 | 34.3 | 70 |
| 2013 | 84.6 | 60 |
| 2012 | 116.7 | 55 |
| 2011 | 109.4 | 55 |
| 2010 | 108 | 54 |
| 2000 | 7.8 | 116 |
| 1999 | 7.4 | 113 |
| 1998 | 15 | 92 |
| 1997 | 35.4 | 72 |
| 1996 | 13.5 | 104 |
| 1995 | 12.9 | 102 |
| 1994 | 12.3 | 102 |
| 1993 | 6.7 | 110 |
| 1992 | 8.4 | 107 |
| 1991 | 8.4 | 99 |
| 1990 | 9.4 | 100 |
| 1989 | 11.5 | 97 |
| 1988 | 8.8 | 101 |
| 1987 | 8.1 | 104 |
| 1986 | 7.5 | 102 |