1955

6.5

1939

5.6

2009

6.2

2024

4.0

1981

3.9

1993

7.6

1994

5.8

2010

5.5

1989

5.5

1958

5.9

1931

5.6

2013

5.0

2016

6.5

1933

6.8

2006

5.0

1947

6.0

2002

7.2

1982

5.3

1975

0.0

2008

5.7