1998

6.2

2015

5.1

2008

6.1

1920

4.0

2017

6.3

2021

6.8

2010

6.5

1989

5.8

1974

5.0

2018

7.3

2015

4.7

1976

4.8

1988

5.5

1971

6.7

1986

6.0

2023

6.2

1985

7.2

2010

10.0