2020

6.7

2017

7.3

2013

5.7

1975

6.4

2021

6.2

1993

6.5

2012

8.4

2019

6.6

1935

6.5

2016

7.2

2014

6.0

1959

6.1

6.6

1989

5.7

1936

7.4

1990

5.7

2012

9.1

2007

5.4

1953

7.2

2015

6.4