Since starting up in 2014, the ACA marketplaces have seen overwhelming churn, and in many cases more enrollees have left state marketplaces than joined year-over-year. This map illustrates those differences between the 2016 open enrollment period and the 2017 period ending Jan. 31, 2017. States that lost more enrollees than they gained are colored in red, while states that accumulated subscribers year-over-year are seen in grey. States with little change in either direction appear in white.