1922

7.7

1996

7.0

1970

5.0

1995

4.6

1962

6.0

1971

4.3

1944

6.0

1971

4.5

1972

4.8

1967

7.0

2010

0.5

1983

6.7

1976

6.0

1985

7.0

1985

6.2

2002

6.1

1999

4.6

1988

5.9

2000

6.6

1995

6.1