1980 6.8

1980 5.1

1980 6.9

1980 6.3

1980 6.5

1980 5.3

1980 6.3

1980 5.3

1980 5.1

1980 6.2

1980 6.1

1980 5.5

1980 7.9

1980 5.7

1980 5.4

1980 4.6

1980 5.4

1980 7.0

1980 6.9

1980 6.5