% of products in X-Axis

[#1]

Hi,

I would like to make a paretto curve, to see how many % of our products contribute how many % of our sales.

I would ideally like to have the cummulative % of products selected on the x-axis, but i cannot seem to do a count(above(product_code)) to get the number of products, and therefore i cannot get the % of the total number of products.

Does anyone know of a way to do this? what I would like to end up with is something like the image i attached.

Thanks for all your help!!