1949

7.5

1988

6.3

1990

5.9

1939

7.1

2001

6.1

2011

6.2

1960

7.7

2024

7.9

1987

7.2

1980

6.8

2011

7.6

1977

5.7

1975

6.4

2016

7.0

1988

4.5

2007

6.1

1952

6.8

2015

5.9

1948

7.4

1958

7.4