1983

7.0

1988

6.7

2009

6.7

1973

6.3

1932

6.8

1976

6.8

1982

7.6

1953

7.3

2017

8.2

1979

6.1

2016

6.2

1956

7.9

2017

6.9

1952

6.7

1976

6.3

1974

6.1

1946

6.4

2009

6.0

2009

7.7

2017

4.6