1920

6.7

2006

7.2

7.8

2007

8.1

2019

6.3

2016

7.5

2018

5.9

2009

5.6

1972

6.7

1937

7.2

2021

7.7

1963

7.7

2012

6.0

2011

5.7

1993

5.6

2007

6.9

2023

7.1

2022

6.3

2023

7.9