1947

7.4

1997

6.8

1923

6.8

1932

5.9

1959

7.7

2016

6.0

1981

7.0

1937

6.7

1951

5.7

1948

7.2

1967

5.5

1987

7.2

1970

7.3

2018

5.8

1937

7.2

2002

5.2

2008

6.8

2020

6.6

2012

7.6

1987

7.0