1962

7.6

1975

1.0

1975

5.5

1985

5.3

1925

7.6

1967

7.3

1979

6.9

1922

7.1

1995

7.7

1979

7.7

1928

6.9

1974

6.7

1993

7.4

1968

7.1

1927

8.1

2005

7.5

1959

7.8

2005

7.4

1963

8.1

2001

6.8