1931

5.8

2021

7.4

2018

6.7

2012

6.2

2011

6.6

5.7

2017

5.9

2020

7.0

2004

6.0

1958

7.3

1956

7.1

2006

5.7

1993

5.6

1946

7.7

1941

7.3

2005

5.8

1986

5.8

1964

7.4

2014

7.3

2016

6.5