2005

8.3

2017

4.6

2021

10.0

1965

6.8

1997

6.1

2023

6.2

1911

9.5

1971

6.8

2020

7.4

2021

7.4

2011

6.4

1981

8.5

2023

9.4

1941

7.4

1967

6.5

1984

6.5

2009

5.6

2012

7.0