1988

5.5

1987

8.0

2005

5.4

1960

6.4

2008

5.8

1989

5.1

1970

6.2

2015

7.2

2019

7.7

1979

7.0

2023

9.3

2011

6.0

1947

7.1

2011

7.4

2014

6.3

2018

6.7

1977

7.0

2024

5.5