2012

6.2

2015

5.1

2011

7.1

1968

6.9

2020

6.0

2019

6.9

1980

6.3

2016

5.3

1976

4.8

2020

7.2

2017

6.0

2012

7.2

2017

6.0

2019

7.6

1956

7.3

2014

5.7

1970

7.5

1993

6.1

2019

6.2