1971

6.1

1975

5.8

1967

7.0

1976

5.3

1968

6.2

1962

5.2

1966

0.0

1973

4.0

1972

7.2

1962

6.0

1964

5.0

1975

6.2

1974

5.2

1965

5.9

1960

0.0

1975

5.7

1976

2.0

1977

5.0

1960

4.0

1961

4.3

1958

0.0

1972

6.3

1976

4.9

1973

5.5

1963

4.3

1975

5.6

1974

5.4

1974

7.2

1966

5.5