South Dakota: Min. 42% increase since 12/23 via 2 of 3 companies
A 42% increase from South Dakota since 12/23 is pretty good by itself. However, this number only covers 2 of the 3 insurance companies participating in the exchange. I have no idea what sort of market share the 3rd company has in SD, so I can't speculate as to how many more enrollments they have to add to the total.
I've also subtracted a the corresponding 1,000 difference from the "unspecified" Federal pool at the bottom of the spreadsheet to compensate.
As of Jan. 1, about 3,550 people in South Dakota had signed up through the federal marketplace website from Avera and Sanford, with about 2,700 from Avera and about 850 from Sanford. DakotaCare figures weren’t available.