2014

8.3

2010

6.7

2016

8.5

2013

8.3

1976

7.9

1999

7.5

2015

7.7

1985

8.2

1990

6.9

1986

7.1

2018

8.1

2016

8.0

2013

8.0

2019

8.2

2020

8.3

2018

8.1

2020

8.6

2020

7.5

2016

8.4

2017

7.2