1970

6.2

2017

7.6

2019

8.1

2014

5.5

2018

7.3

2019

7.6

1994

8.7

1990

7.2

1968

7.8

2014

7.9

1998

7.7

1957

7.9

1952

8.3

2024

6.9

1957

7.0

2015

7.6

2019

7.4

1992

7.8

1943

8.2

2019

7.0