1970

5.3

2011

6.9

2008

5.7

2011

6.7

1965

6.8

2023

7.1

1964

7.0

1993

7.0

1984

6.3

1955

7.2

2013

7.3

1974

7.0

2016

4.6

2024

5.8

2012

6.4

2023

7.3

2002

7.1

2013

5.9

2021

6.6

1980

7.3