7.8

1921

7.6

2009

7.3

2014

7.1

1991

7.6

2016

6.2

1976

7.0

1999

8.0

1999

7.5

2014

5.6

1932

6.9

1985

6.2

2014

6.8

1950

6.8

1960

8.1

2016

6.7

2020

7.1

1988

7.1

1996

5.9

2021

6.0