1959

8.1

1996

5.3

2014

5.6

1988

6.5

1931

7.3

1947

7.7

2013

6.3

1989

5.1

1989

5.5

1952

7.7

1953

8.0

1982

5.2

1933

7.6

1952

6.7

1960

8.1

2015

7.4

5.8

1969

5.9

1984

7.2

2011

7.1