1977

4.6

1990

2.6

1966

5.1

1961

5.0

1965

7.2

1975

4.5

1988

4.8

1973

0.0

1994

6.8

1956

7.1

1978

7.0

1961

0.0

1958

7.0

1976

6.0

1957

4.7

1964

7.0

1977

0.0

1975

8.0