1968

6.9

1974

6.2

1972

6.6

2018

6.5

2022

5.8

2012

5.9

1993

6.1

2024

7.3

2014

5.3

2016

7.0

2021

6.6

2017

6.3

1968

6.4

2016

5.7

1983

6.9

2011

6.3

1992

6.7

1989

5.3

2001

6.9

1967

6.7