1977

6.2

2021

8.1

2011

6.2

2007

8.1

8.0

1999

7.2

2005

5.2

1990

7.1

2023

6.1

2014

7.6

1985

6.0

2021

7.4

2006

6.7

2018

5.8

2020

7.8

1969

6.8

2018

5.9

2024

5.8

2012

6.2

2006

6.7