1979

6.4

1997

7.5

1999

6.5

2001

6.2

1956

6.7

1999

6.7

1981

7.4

1976

4.9

2014

5.5

2021

0.0

2004

5.4

1995

4.8

2018

5.4

1960

7.4

2023

7.0

1935

7.0

2025

0.0

1987

6.8

1988

7.1

2007

7.2