1997

7.4

1986

7.5

1953

8.0

1955

7.5

1940

7.9

1983

7.2

1930

7.3

1986

7.9

1972

8.7

1974

8.6

2002

6.7

1971

7.5

1973

6.5

2005

6.7

2019

5.4

2016

6.1

2023

6.2

2022

5.8

2008

1.0

2024

6.5