Stacked proportion plots

As discussed, proportions are being affected by the fact that we have wildly uneven number of elements between subsets.

If there is a possible alternative to this, I think it is already there as well. We are just using a different denominator for the percentages. Also this answers a different but related question, something like this: What percent of respondents with less than a year experience use this or that?

@michaelquiapos, @Gio-Q, do you have other plots in mind that can be used alternatively?