Is there a way to show the probability within hue category in Seaborn histogram

Question

For example, I have a dataframe:

data = {\'1\': [1, 1, 2,2,2,2,2, 3,2.5,2.5,1.5,2,2.5,2, 2, 3,1.5,2],
       \'2\': [1,1,1,1,1,1,1,1,1,1,1,1,1,1,0, 0,0,0],