1978

5.2

1964

7.5

1997

6.7

2004

6.7

2020

5.4

2009

7.2

2006

7.1

2019

2.5

2021

6.8

2014

6.6

1923

0.0

2023

8.0

1973

7.4

2023

5.4

2010

5.2

2012

6.8

2002

6.8

1987

5.0

2005

4.4

2008

4.6