1980

6.7

2009

5.3

2018

6.5

1984

6.2

1972

6.2

2017

7.0

1979

7.6

1991

5.6

2005

8.3

2020

6.1

1991

5.5

2025

6.3

2024

5.9

1970

6.4

2017

6.9

1975

7.2

1988

6.9

2012

5.9

2025

6.5

2019

6.2