1970

5.4

1957

5.1

1971

5.1

1975

6.0

1973

5.8

1983

4.3

1975

5.7

1961

3.6

1988

5.2

1991

4.4

1960

6.4

1956

6.1

1957

5.7

1971

1.0

1985

4.5

2018

6.0

1964

4.3

1981

2.5

1957

5.7

1974

4.7

1959

4.8

1982

5.0

1958

3.9

1970

5.4

1969

2.7

1967

5.7

1958

5.2

1971

3.5