1961

0.0

1968

6.7

1952

6.8

1985

7.1

1960

0.0

1950

8.1

2000

8.2

1950

8.1

1963

7.5

1958

0.0

1995

5.8

1972

7.4

1984

5.7

1966

7.0

1981

0.0

1939

4.0

2015

5.8

1984

5.0

1933

6.2

1967

6.8