1989 6.1

1989 7.8

1989 6.8

1989 6.5

1989 6.1

1989 6.0

1989 6.4

1989 7.1

1988 7.4

1988 6.6

1988 5.8

1988 8.1

1988 6.8

1988 6.1

1988 5.9

1988 6.4

1988 5.8

1988 7.7

1987 6.3

1987 7.2