1979

6.9

1987

7.8

2014

5.9

1992

7.5

1929

7.5

1932

5.0

2017

6.7

1958

7.6

1984

8.0

1998

7.4

1957

8.5

1966

7.7

1973

2.3

1915

4.5

1989

7.2

1954

7.9

1996

6.8

1929

6.5

2003

7.8

1953

7.7