2014

4.6

2019

7.1

1982

5.8

2018

7.0

2010

7.7

2017

6.2

2015

5.9

2020

6.5

2018

6.6

2017

5.3

1992

5.4

1960

6.4

2017

6.4

2018

4.5

1983

7.0

2020

6.2

1998

6.5

2019

6.3

2011

6.4

2018

6.6