1991

5.4

1970

7.5

2000

6.4

1956

7.7

1971

7.4

1966

7.1

2003

4.7

1958

6.7

1968

6.5

1950

5.4

1951

5.5

1959

6.7

2015

6.9

1954

7.2

1938

4.2

1947

0.0

1945

0.0

1967

6.2

1945

4.0

2016

7.3