1971

6.0

1993

6.5

2015

7.4

1895

5.5

1989

7.0

2010

6.1

2008

6.7

1982

5.2

1993

6.5

2001

6.4

2008

7.5

2019

6.6

1982

6.9

2021

6.2

2020

6.7

2012

6.3

2001

6.7

2012

7.2

2021

7.7

1957

7.8