1959

7.8

1960

2.0

1950

6.3

1953

7.4

1956

6.7

1971

6.3

1955

5.7

1958

6.7

2021

6.5

1965

5.6

1949

5.7

1979

5.0

1968

5.7

1955

5.0

1967

6.2

1999

5.3

1970

7.1

1972

6.4

2017

6.8

1993

7.6