1985

6.1

2020

6.3

2015

6.4

2015

6.6

1958

5.2

2011

6.4

6.7

2023

6.5

6.5

2008

6.7

2023

6.8

1972

6.3

1985

6.9

1975

6.9

2018

6.5

2018

6.3

2004

7.0

2020

6.5

1968

6.9

2017

6.0