1996

6.3

2018

4.2

2007

6.1

2001

4.8

2014

6.1

2004

5.5

1960

4.0

1995

8.0

2008

5.3

1978

6.0

2019

8.0

1948

2.5

2021

7.4

2017

5.9

2020

5.0

2008

7.5

2021

0.0

2022

7.1

1977

7.0

3.8