1980

6.3

1986

6.6

1979

8.1

1968

7.7

1983

7.9

1992

6.3

2004

6.5

2013

7.9

1941

8.0

2021

7.9

2023

8.1

2003

7.4

2008

7.3

1984

7.5

1987

7.3

2016

6.0

2022

7.8

2014

7.6

2001

6.8

2009

7.8