1961

5.5

2011

6.6

2021

6.1

1953

7.2

2019

6.5

1999

6.6

1993

6.5

2022

7.0

2022

6.1

2015

5.1

2010

6.8

2013

6.7

1965

6.3

2000

5.1

1931

5.8

2023

6.8

1980

5.9

2006

6.8

2024

6.5

1972

7.7