1969

6.7

2006

5.8

1937

7.9

2005

6.6

1997

5.8

1952

7.8

1958

7.4

1971

4.2

1954

7.2

1986

6.7

2004

7.3

1963

6.5

1963

6.3

1925

7.6

2014

5.5

2006

6.6

1970

5.0

2017

6.1

2019

7.7

1978

6.5