1955

6.2

1978

6.8

1962

4.7

1968

5.5

1964

4.5

1966

4.2

1927

0.0

1964

4.7

1961

6.6

1967

4.3

1972

5.0

1967

3.8

1935

4.0

1965

3.0

1964

6.3