1950

8.1

1972

4.0

1955

6.6

2006

5.5

1960

6.0

1968

0.0

2013

0.0

1932

7.0

1978

7.3

1983

8.0

1955

7.3

1950

7.4

1989

6.5

1971

5.8

1971

3.6

1971

5.2

1972

5.0

1988

0.0

1972

6.0

1957

6.8