1955

5.6

1958

6.6

2012

5.6

2016

6.0

1994

5.7

2024

7.1

2018

6.9

2019

6.2

2010

6.2

1998

7.3

2023

6.1

2015

6.0

2019

6.7

1972

7.0

2013

7.6

2012

6.4

1980

6.3

2019

8.1

1988

6.4

2009

6.4