1968

6.9

2013

6.2

2020

6.3

1989

7.2

1993

6.1

2016

6.7

2010

9.1

1932

6.4

2018

6.0

1969

7.7

1896

4.8

2019

6.0

1996

6.4

2006

4.6

1985

6.2

1961

6.9