Sign-ups for Obamacare continue to fall behind last year’s pace, but the final tally could jump in two weeks when millions more current customers are automatically re-enrolled into the program if they fail to drop out or make changes.

The latest numbers out Wednesday from the Centers for Medicare and Medicaid Services show that during the first 24 days of open enrollment, 2,424,913 people signed up for health insurance plans on healthcare.gov, the Obamacare website that connects people with private insurance who don’t have coverage through a job or government program.