1947

7.6

1971

6.8

1954

8.0

1968

7.3

1986

7.6

1995

8.4

1951

7.7

1987

6.5

1968

7.1

1995

7.9

1941

7.7

1971

7.4

1946

7.6

1994

5.9

1993

7.5

2002

6.9

2007

6.8

1957

4.8

2020

7.1

1933

5.5