1958

6.7

1961

7.5

1953

6.1

1955

7.7

1953

7.1

1961

6.5

1959

7.5

1952

4.1

1950

7.1

1955

5.8

1956

5.5

1951

6.5

1952

6.1

1955

6.6

1951

7.9

1954

6.9

1955

7.0

1953

6.2

1953

5.5

1957

6.8

1962

6.7

1951

6.0

1950

6.9

1966

6.4

1958

6.8

1957

7.7

1952

6.3

1951

7.0

1958

5.6

1963

5.7

1955

5.2

1953

7.7

1959

4.6

1950

7.1

1959

6.2

1958

6.1

1952

7.0

1956

5.5

1960

6.7

1960

6.9

1949

6.7

1951

6.3

1957

3.7

1957

6.7

1960

6.3

1956

7.8

1959

8.4

1957

4.6

1959

7.9

1953

6.8

1960

6.1

1957

6.0

1964

7.7

1957

6.3

1950

7.2