1960

4.6

1967

4.8

1985

0.0

1970

5.2

1979

4.5

1981

5.0

1965

7.8

1975

5.6

1982

4.3

1970

4.5

1974

7.1

1990

4.4

1960

5.1

1990

5.0

1972

5.8

1973

5.0

1977

5.7

1984

6.8

1988

5.4

1962

4.5

1978

4.1

1972

5.3

1972

5.0

1960

6.5

2010

7.2

1965

5.6

1972

5.6

1973

5.0