Creating stacked bar charts with percentages in R

Sorry but that is not a repex. That is a screenshot.

here is how to create a reproducible example (reprex)

You do not say what package you are using to create the barplot but here is a link to a post that discusses how to approach the problem using ggplot2 Barplot with percentages.

I wonder if a stacked barplot is the best choice here with 60 elements in a bar? I think it will be close to uninterpretable. If you explain what you are doing in substantive terms someone here may be able to suggest some alternatives.