1981

6.2

1980

6.2

1956

6.6

1975

5.1

1961

6.3

1975

7.5

1937

6.6

1959

7.5

1953

7.0

1964

6.7

1938

4.2

1945

4.8

1971

8.1

1939

4.0

1952

6.4

1944

5.6

1975

6.6

1964

6.6

1945

5.3

1956

6.7

1968

7.2

1951

5.5

1981

6.8

1962

6.3

1945

6.9

1949

6.1

1969

7.0

1952

7.7

1949

6.9

1959

6.5

1940

6.0

1970

4.5

1960

6.4

1978

5.8

1956

6.7

1958

6.8

1944

7.0

1949

7.1

1956

5.8

1962

6.5

1967

6.1

1958

6.3

1957

5.5

1970

6.5

1954

6.7

1964

6.1

1976

6.5

1960

6.0

1971

6.6

1960

7.6

1953

7.7

1952

5.5

1968

6.7

1957

6.1

1979

7.2

1969

6.0

1949

6.8

1957

6.4

1952

5.0

1959

7.0

1956

6.6

1958

7.2

1958

6.1

1969

5.8

1963

5.2

1962

7.8

1944

5.6

1956

5.2

1957

6.3

1956

6.4

1951

6.3

1939

7.5

1949

7.3

1973

7.2

1959

6.6

1974

5.3

1957

7.0

1937

5.8

1959

8.5

1957

6.2

1941

6.5

1953

6.8

1973

7.0

1954

5.2

1970

6.8

1940

6.9

1962

8.0

1963

6.1

1967

6.0

1950

6.4

1957

8.2