1982

4.8

1981

5.8

1986

6.9

1973

5.9

1958

6.1

1967

5.4

1974

4.9

1968

3.1

1966

6.1

1983

5.9

1990

5.4

1974

4.0

1982

3.0

1964

4.3

1977

5.1

1962

6.8

1971

5.9

1975

1.0

1983

4.0

1982

4.2

1980

6.1

1973

4.4

1972

6.9

1967

8.2

1965

5.9

1986

7.5

1967

5.1

1960

7.3

1967

6.1