1958

6.3

1990

7.4

2012

5.5

1966

6.2

2006

5.0

2019

6.5

1977

6.6

2023

7.1

2021

7.9

2007

7.6

1998

5.1

1977

6.1

1933

6.9

1966

7.3

2010

7.5

1975

6.3

2012

5.6

1985

6.6

2020

5.9

2008

5.7