1935

5.0

1987

4.9

2000

7.6

2017

7.1

2013

6.6

1976

6.6

1999

6.9

1940

7.0

2020

6.3

2020

4.0

1998

7.3

1972

6.7

1961

6.8

2018

7.1

2019

6.6

1948

6.7

2012

6.3

2014

7.1

2015

8.4

1953

6.5