1946

7.6

1941

7.7

1947

5.8

1944

7.1

1990

6.0

1948

6.3

1933

6.0

1936

5.9

1931

6.4

1991

5.9

1942

6.8

1994

5.6

1993

5.4

2007

6.2

1995

6.4

1984

7.2

1946

5.0

1936

7.3

2014

5.0

1988

6.1