1986

6.2

2006

6.1

1980

5.9

1959

6.1

2019

5.5

1940

6.3

2004

6.4

1993

6.5

2018

6.4

2020

6.7

2020

6.5

1988

6.3

2014

6.9

2019

7.0

1989

5.3

2001

6.8

2023

6.6

2024

7.6

1966

6.1

2003

6.1