1964

7.4

2009

5.9

2023

9.2

2021

9.2

1981

5.0

2012

5.4

1986

6.2

2014

6.7

2017

6.6

2006

6.1

2004

6.4

1977

6.5

2016

6.4

2013

6.6

1987

5.3

1961

6.7

2019

4.0

2020

6.4

1990

5.7

1958

5.5