1973

6.2

2014

6.5

1949

5.1

2009

4.0

1959

8.1

1965

7.3

1932

6.9

1986

7.6

1958

7.6

1988

6.1

2015

5.9

1935

6.5

2009

5.9

2014

6.9

1958

6.9

1967

7.9

2020

6.6

2019

5.2

1950

7.1

2013

6.9