Michigan has around 531,000 residents enrolled in ACA exchange plans, 91% of whom are currently subsidized. I estimate they also have another ~64,000 unsubsidized off-exchange enrollees.
Massachusetts has around 390,000 residents enrolled in ACA exchange plans, 83% of whom are currently subsidized. I estimate they also have another ~27,000 unsubsidized off-exchange enrollees.
Maine has around 64,000 residents enrolled in ACA exchange plans, 85% of whom are currently subsidized. I estimate they also have another ~4,500 unsubsidized off-exchange enrollees.
Combined, that's around 70,000 people, although it could be somewhat lower due to net enrollment attrition since January.
Minnesota has around 151,000 residents enrolled in ACA exchange plans, 61% of whom are currently subsidized. I estimate they also have another ~62,000 unsubsidized off-exchange enrollees.
Kansas has around 200,000 residents enrolled in ACA exchange plans, 94% of whom are currently subsidized. I estimate they also have another ~6,000 unsubsidized off-exchange enrollees.
Kentucky has around 97,000 residents enrolled in ACA exchange plans, 86% of whom are currently subsidized. I estimate they also have another ~6,800 unsubsidized off-exchange enrollees.
Indiana has around 359,000 residents enrolled in ACA exchange plans, 90% of whom are currently subsidized. I estimate they also have another ~6,700 unsubsidized off-exchange enrollees
Iowa has around 136,000 residents enrolled in ACA exchange plans, 88% of whom are currently subsidized. I estimate they also have another ~9,600 unsubsidized off-exchange enrollees.
Hawaii has around 26,000 residents enrolled in ACA exchange plans, 83% of whom are currently subsidized. I estimate they also have perhaps another ~1,700 unsubsidized off-exchange enrollees.
Idaho has around 117,000 residents enrolled in ACA exchange plans, 86% of whom are currently subsidized. I estimate they also have another ~9,000 unsubsidized off-exchange enrollees, although the actual rate filings (summarized later in this post) put the off-exchange total at a much higher ~47,000.
Combined, that's 6.2 - 8.0% of their total population.