1980 5.1

1980 4.9

1980 5.3

1980 5.1

1980 5.2

1980 4.7

1980 5.7

1980 7.0

1980 6.3

1979 8.4

1979 6.6

1979 7.3

1978 7.8

1978 6.8

1978 5.7

1978 6.2

1978 6.9

1978 4.3

1978 7.7

1977 7.3