1977

4.1

1972

7.3

1970

5.4

1967

5.0

1971

2.5

1969

8.0

1961

7.7

1931

4.2

1968

0.0

1937

4.0

1973

6.6

1974

4.5

1939

4.0

1976

2.3

1969

5.8

1973

6.0