2020

7.8

2015

7.4

2013

6.1

2016

6.3

2017

6.9

2015

7.2

1989

7.3

1971

7.1

1982

5.4

2018

6.5

1926

7.9

2018

7.0

2016

6.8

2014

3.7

2019

7.5

2014

5.8

2019

5.8

1998

5.9

2017

6.6