1940

5.8

1994

3.3

1952

6.4

1970

5.6

1981

6.4

2019

6.2

1986

5.1

2009

4.9

1961

7.0

1988

6.0

1987

5.9

1955

5.0

1966

6.2

1973

6.2

1996

5.8

1971

10.0

1931

0.0

2016

5.2

2022

6.3

1998

9.5