1961

7.2

1998

6.9

2005

6.8

2003

7.2

1980

8.1

2018

6.6

1990

7.0

2023

7.6

1952

5.3

2007

6.7

1936

6.5

1939

7.2

1946

7.5

2002

7.3

2020

6.7

2004

6.8

1991

6.3

1954

6.9

1969

0.0

1976

6.0