1936

6.6

1976

4.8

1990

1.0

2002

6.8

1972

7.4

1991

6.1

1989

5.9

1935

4.5

1992

4.5

1955

5.0

1997

6.3

1941

6.9

1947

5.8

1959

4.4

1963

5.8

1997

6.7

1963

5.2

1937

5.5

1952

2.0

1967

6.0