1958

6.2

1963

4.2

1951

8.7

1963

5.3

1950

6.9

1949

7.1

1955

6.0

1964

5.0

1960

6.4

1998

8.0

1957

5.4

1969

0.0

1959

5.2

1966

6.7

1951

5.0

1955

6.0

1961

5.5