1975

8.7

2020

8.0

1996

6.5

2011

6.4

1993

6.5

2023

6.4

2024

6.6

2011

6.6

2015

6.6

1989

5.5

2017

6.1

1999

6.8

1984

7.2

1988

6.5

1980

5.9

2020

6.7

1985

6.9

2012

5.8

2023

6.6

1966

6.2