1966

6.3

1988

6.7

1987

4.5

1973

7.7

1999

7.1

2017

6.2

2015

3.7

1982

5.8

1947

6.9

2020

6.2

2010

5.1

2019

6.6

2018

5.6

2021

7.8

2015

5.6

2007

4.9

1957

6.2

2019

7.4

1990

6.1

2015

7.5