1979

6.2

1958

5.7

1945

6.5

1993

6.5

2017

6.2

2014

6.2

1980

6.0

1988

9.0

1970

4.2

1966

7.2

1950

6.0

2008

2.3

1978

6.5

1964

5.5

1991

5.2

1989

3.0

1975

3.0

1962

3.4

1969

4.0

1975

5.8