1980

6.3

1952

7.7

6.6

2021

6.8

2018

6.5

2008

7.1

1967

7.0

1993

7.6

1972

6.6

2013

6.5

2014

6.8

2014

7.6

2004

6.1

2021

6.9

1973

7.7

2023

7.2

2006

5.5

1975

6.4

2020

6.3