2000

6.9

1990

6.4

1952

6.7

1955

7.2

1993

6.5

1989

5.5

1963

6.9

2012

5.7

1965

7.3

1972

7.9

1921

6.8

1994

7.4

1988

6.2

1928

7.8

1998

7.1

1977

7.0

2002

7.4

2021

6.1

1955

7.2

1996

6.9