As you can see from the chart below, Kurds make up a disproportionate number of political prisoners executed this year. Of the 48 political prisoners executed in 2016, 41 were of Kurdish descent (85%).
Of all known ethnicities currently detained in Iran's prisons, 385 out of 665 detainees (58%) are of Kurdish decent.
You can take the interactive visualization tool for a spin by clicking here.
(source: Iran Prison Atlas)