1949

8.0

1989

7.5

1976

7.2

1940

7.0

1961

7.7

1969

5.9

1990

6.5

1972

7.1

1989

5.1

1958

7.6

1952

7.6

1944

7.4

1984

7.2

1928

8.0

1963

7.0

2003

6.8

1963

6.5

1969

6.8

1976

7.6

2004

6.8