2005

5.5

1997

6.6

1972

7.9

1979

7.1

2003

6.1

2004

5.9

1960

6.6

2009

6.9

1981

6.4

1938

7.3

2008

6.0

1931

5.0

2001

6.3

1976

7.0

2006

6.6

1937

6.8

1945

0.0

1960

6.0

1972

5.5

2013

4.3