1989

8.1

1949

0.0

1972

6.3

1980

5.3

1978

7.0

1975

7.1

1993

0.0

1952

7.4

1950

6.5

1973

6.7

1961

0.0

1973

5.1

1971

7.6

1979

6.1

1968

7.5