2014

6.7

1996

5.8

1993

7.4

1986

6.1

2002

6.8

1987

7.2

1939

7.5

1958

7.5

1952

7.9

2001

7.3

1988

6.3

2001

6.8

1936

6.5

1971

4.5

1995

7.4

1930

0.0

1990

0.0

1938

1.0

1970

7.1

2005

5.6