1968

7.6

2017

8.2

1983

4.1

1985

6.6

1959

6.3

2009

7.8

1998

6.6

1983

6.7

2014

4.7

2015

6.0

2018

5.6

2000

7.1

1991

5.9

2021

5.9

2022

4.3

1997

7.0

2023

2.5

2009

5.5

1955

5.8

2016

7.0