1989

8.2

1949

0.0

1972

6.3

1996

0.0

1974

5.5

1980

5.0

1978

7.0

1993

0.0

1952

7.4

1950

6.5

1973

6.8

1961

0.0

1973

5.1

1971

7.6

1979

6.1

1968

7.5