1979

5.0

1994

9.7

2007

8.2

2011

9.8

2007

4.7

2020

7.2

2010

9.5

2019

2.5

1973

7.0

2014

6.3

2017

7.2

1996

9.4

1967

5.0

1941

5.5

2015

3.8

1976

6.0

2023

5.6