1976

6.2

2022

9.9

2009

6.5

2023

9.3

2020

7.4

2021

7.4

2007

8.1

2011

6.2

2006

6.4

1930

7.8

2010

6.6

1968

6.9

2002

7.5

1957

7.2

2010

7.3

2011

6.3

2008

5.9

2017

4.5