1977

5.9

1972

6.3

1978

6.3

1982

6.2

2009

6.0

1973

6.8

1984

5.8

1949

6.7

1967

6.2

1958

7.2

1993

5.7

1942

6.9

2001

10.0

1987

5.9

1993

5.5

1968

6.4

2015

6.2

1974

6.9

1981

7.0

2021

4.9