1963

7.9

1962

5.7

1956

5.0

1951

8.3

1980

3.5

1984

5.0

1981

5.0

1974

7.1

1975

7.2

1949

5.5

1951

6.1

1973

4.1

1973

5.1

1948

6.0

1957

5.6

1954

4.6

1953

6.9

1961

6.8

1968

6.4

1948

8.0

1951

6.8

1950

6.9

1951

6.6