1990

6.1

2014

6.2

2020

6.9

6.1

2023

8.4

1938

6.8

1991

4.7

2024

8.1

2015

5.4

1986

6.6

1973

9.2

1987

6.8

2008

6.4

2017

8.2

2023

6.9

2013

6.1

2021

6.0

1996

6.3