1998

6.8

1975

7.5

2001

6.7

1966

6.3

1955

3.5

1961

5.5

2000

6.3

1948

7.8

1976

6.8

2004

6.2

1990

5.2

2006

6.1

1959

7.5

1934

7.1

1952

5.3

1981

5.7

1982

6.0

1931

4.3

1974

0.0