6.6

1958

5.2

1975

7.0

2023

7.1

1985

6.8

1981

6.5

2020

6.4

1980

5.9

2020

5.5

1949

6.2

2016

6.7

2010

6.1

1989

5.8

2023

5.9

2023

6.7

2015

6.6

1959

8.2

2011

7.5

1988

5.8

1968

6.9