6.4

5.0

2021

6.2

1975

4.5

1967

6.5

1989

5.8

2020

5.6

2015

6.4

1994

7.2

2020

6.8

1956

7.1

2022

4.5

2022

7.8

2014

8.5

2007

5.8

1979

6.2

2004

6.6

1998

6.0

2009

7.6

2007

7.2