1996

8.0

2006

6.4

1980

5.9

1953

4.8

1967

6.1

7.3

2020

6.5

2020

5.9

2007

5.7

2022

6.7

2010

9.1

2009

4.1

1968

6.9

1984

6.7

2012

9.3

1999

6.8

2021

7.7

1975

6.3

1940

6.3

2022

6.2