6.8

2017

7.3

1985

6.9

1992

6.4

2019

6.4

6.8

2010

7.3

2000

9.4

1975

7.0

1969

4.7

1972

6.3

2009

8.5

1953

4.8

2016

6.2

2021

6.3

1979

6.0

2023

6.9

7.1

2015

6.6

2020

5.2