1977

6.3

2009

8.5

2013

6.4

2018

6.4

2001

7.2

2001

9.4

6.8

2022

7.1

2017

6.9

2019

6.2

1979

6.0

2021

8.2

2022

7.1

2012

5.7

1969

7.6

6.6

1972

6.6