6.6

2009

7.5

2013

8.1

2012

4.3

1951

7.6

2018

6.7

2020

6.0

2017

6.9

6.6

7.8

1997

6.5

2009

7.9

2009

7.6

2022

7.6

1998

7.5

2011

7.1

1930

7.7

2004

4.7

6.9

1979

7.0