1968

7.1

2000

4.3

2011

6.7

2006

5.1

2013

6.2

1980

6.0

1942

6.5

2016

7.1

2018

5.3

1996

5.8

1991

5.7

2017

6.0

1999

5.7

2020

5.3

2023

6.2

1950

6.9

2005

5.3

2020

6.8

2012

7.3

1957

6.8