1973

0.0

1976

0.0

1906

5.3

2008

6.2

2000

6.9

1975

6.1

1978

4.0

2009

7.0

1956

6.9

1990

6.2

1965

0.0

1937

5.3

1913

5.0

1979

6.7

2004

6.5

1981

6.0

2010

6.8

1936

6.8

1983

3.5

2001

7.9