1983

6.0

2018

6.3

1980

5.7

1974

3.0

1993

6.7

1987

5.8

1970

6.5

2001

5.2

2017

5.7

2006

6.1

2010

7.8

1962

6.8

1994

6.1

1932

6.9

1936

5.0

1936

4.7

1996

6.7

2004

7.2

2019

6.5

1983

4.5