Question: plot a dataset

I have a dataset.  For example
with(Statistics):
a := [0, 7, 0, 7, 20, 18, 34, 34, 35, 35,1, 7, 10, 6, 7, 5, 4, 7, 7, 2, 6, 2, 22, 2, 3, 12, 12, 14, 10]; 
Histogram(a,frequencyscale=absolute);

How do I create a smooth line curve through the points.  Also it doesn't seem to bar graph properly, the 0's and 1's are combined and the 35's and 34's are combined.  Not sure why that is.

 

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