1968

6.4

2006

6.7

2010

6.3

2021

5.3

1949

6.2

2023

7.4

2021

7.2

2020

7.2

1982

6.5

2009

6.9

1934

7.5

1929

6.2

1922

7.7

1972

4.0

1964

7.1

2001

6.7

2018

6.0

2013

6.6

2019

6.7