1959

4.0

2000

7.1

1952

6.7

1980

6.8

1972

7.4

1991

0.0

2019

6.7

1979

7.1

1987

7.3

2002

7.7

1997

6.6

1965

6.8

1982

7.6

1989

7.5

2018

6.8

1960

6.0

1994

7.3

1938

6.0

1968

5.7

1995

6.3