1985

6.9

2015

6.5

2020

6.4

2015

6.5

1985

6.1

2019

6.7

2018

6.5

6.5

2023

6.4

1992

6.5

2018

6.3

2023

6.7

2015

6.4

2006

6.7

1972

6.5

2008

6.7

2020

6.3

1972

6.3

6.6

1976

7.5