Line Plots · Hard problem

A line plot shows how many stickers each of $8$ friends has. Above $1$ there is $1$ X, above $3$ there are $3$ X's, above $4$ there are $2$ X's, above $6$ there is $1$ X, and above $8$ there is $1$ X. The friends put all their stickers in one pile and share them out equally. How many stickers does each friend get?