How to create a Streamgraph?

Hello friends,

I am trying to create a Streamgraph, a stylish variation of the Stacked Area Graph.

I was able to visualize the Data into an Area Graph and a Stacked Area Graph,
however the Streamgraph is over my abilities…

I found however a paper that has the Math layed out, so maybe someone (@snaut ?)
has an idea how to solve this in TD?

Here is what I have so far:
Stacked_Area_Graph.toe (87.2 KB)

Thank you!

All the best
Stefan