1969

8.3

2017

5.9

2014

6.6

1931

5.8

1980

5.9

2021

7.8

2010

5.5

7.8

2019

6.2

1993

6.1

1994

5.5

2009

7.5

1957

6.9

2007

8.1

1932

6.8

2015

8.4

2003

10.0

1981

3.2