2017

6.9

1993

5.5

1990

6.4

2020

6.1

2021

7.2

2015

7.0

1958

7.6

2020

6.3

2019

5.9

1997

6.1

2019

6.0

1976

6.6

1987

7.4

2017

6.2

2019

6.6

2001

7.5

2016

5.6

2017

6.3

2019

6.5