1972

7.3

1975

5.9

1952

7.3

1995

6.6

1960

7.5

2003

5.8

1957

7.8

1974

7.9

1969

5.8

2009

7.6

1974

5.5

1982

7.0

2018

5.0

2017

6.6

1925

8.0

2006

7.0

1993

5.7

1954

5.8

2013

6.6

1931

7.1