1992

8.4

2019

10.0

2023

7.1

2022

7.7

2014

6.0

1968

6.4

2019

7.3

2017

7.7

2018

7.0

1952

7.4

5.8

2003

6.0

1984

4.2

1987

4.0

2002

5.5

1981

6.7

2016

4.6