1998

6.0

1980

5.9

2012

5.7

2008

6.5

2020

6.7

1996

6.5

1968

6.9

1959

6.1

2014

7.0

1926

5.6

1987

5.2

2023

6.1

2016

6.5

1965

6.3

1995

4.6

1969

6.6

1993

6.5

1999

5.9

1943

6.4

2017

6.2