1990

6.9

2006

6.7

1956

6.2

2004

6.1

2002

6.7

2004

6.8

1980

6.2

2017

6.3

2002

6.0

1945

7.6

2008

7.0

2006

7.1

1993

5.0

1924

3.5

1994

6.3

2021

0.0

1931

0.0

1970

7.1

2020

4.9

1992

6.2