5.4

1993

5.8

1977

5.4

2020

6.7

2007

5.7

2014

6.5

1973

5.2

2014

6.0

2011

7.1

2021

9.2

2002

4.6

6.3

1976

4.9

2002

4.7

1998

8.1

2012

6.0

1976

7.5

1946

6.9

1988

6.1

2021

7.5