1986

6.2

1985

6.9

2012

5.8

2020

6.7

1971

6.0

1988

5.7

1988

6.2

2021

6.6

1985

6.1

1993

6.5

2018

6.3

1980

5.9

2019

6.6

2015

6.6

2002

5.3

2015

6.7

1965

6.4

2001

4.8

2020

6.5

2023

6.9