1949

6.2

1979

2.0

1955

7.7

1956

6.0

1961

5.0

1978

3.5

1965

6.3

1966

7.6

1959

6.7

1957

7.7

1972

5.2

1976

0.0

1970

3.3

1963

7.2

1955

6.0

1962

5.2

1967

6.5

1959

8.4

1964

5.6

1956

6.2

1952

6.9

1984

3.0