2017

8.0

2014

6.7

1987

6.3

2005

5.8

1981

7.1

1975

7.9

2023

10.0

2000

7.6

1997

6.6

1990

7.2

2020

6.9

2020

0.0

1977

7.7

2021

8.0

1926

0.0

2003

6.5

2009

6.3

2019

0.0

2002

5.5

2016

5.8