NEW YORK (AP) — Fewer Americans are signing up for Affordable Care Act health insurance plans this year, new federal data shows, as expiring subsidies and other factors push health expenses too high for many to manage.

Nationally, around 800,000 fewer people have selected plans compared to a similar time last year, marking a 3.5% drop in total enrollment so far. That includes a decrease in both new consumers signing up for ACA plans and existing enrollees re-upping them.

The new data released Monday evening by the Centers for Medicare and Medicaid Services is only a snapshot of a continuously changing pool of enrollees. It includes sign-ups through Jan. 3 in states that use Healthcare.gov for ACA plans and through Dec. 27 for states that have their own ACA marketplaces. In most states, the period for shopping for plans continues through Jan. 15 for plans that start in February.