1996

6.5

2014

6.0

2006

5.7

1976

4.2

2004

4.8

1961

4.3

1994

6.2

1974

3.7

1975

5.5

1928

5.6

1951

6.4

1949

7.0

1928

7.3

2014

6.2

1988

5.6

2018

6.5

1983

3.8

1939

7.5

2009

6.2

1995

6.3