1980

8.4

2018

6.0

2015

8.2

1984

7.3

2021

6.7

2019

5.7

1987

6.7

2016

6.8

2021

8.9

2023

8.0

2023

4.7

1972

7.5

1937

5.5

2013

9.6

1995

6.5

2011

6.7

2017

9.0

2023

6.0