Y Axis Counting Decimals

I have a graph I am using to display units (y-axis) that sometimes can be in the range of 10-30 (which are no problem), and sometime 1-5. With the count that is 1-5 it shows 1,1,2,2,3,3. I am looking to just show whole numbers 1,2,3 - at the same time not making too many ticks for when a case comes with 10-30 units. I am replicating the graph so some cases may have 1-5 units and others 10-30 units on the y-axis.


I want to adjust the settings so i can replicate the graph and the y-axis doesn't have decimals for those lower ranges 1-5.

Hope this makes sense, thanks.