1981

6.4

1943

8.2

2014

6.8

2013

5.0

2004

7.7

1972

6.0

1947

6.0

1945

5.0

1945

5.2

1950

5.6

1959

6.0

1949

5.8

1969

0.0

2006

5.0

2003

6.6

1997

6.7

2014

0.0

1958

5.0

0.0

2013

6.0