2019

8.9

2009

7.5

1939

5.0

2007

5.7

1985

5.9

2017

7.4

2016

8.0

2018

6.5

2020

8.0

1979

5.2

1985

6.3

2005

6.0

1972

7.7

1976

3.7

1990

6.3

2017

6.1

1992

6.2