1959

4.3

2003

6.1

1969

6.6

1975

6.0

1976

3.6

1941

6.9

1943

7.4

1933

6.3

1933

6.9

1989

4.5

1996

6.6

2004

5.6

2008

7.0

1950

5.2

1954

6.0

1933

6.3

1944

6.3

1928

7.8

2007

4.6

2003

6.8