The latest data come from the Blue Cross Blue Shield Association, whose members—known collectively as “Blues” plans—are participating in the exchanges in almost every state. Roughly 80 to 85 percent of people who selected a Blues plan through the exchanges went on to pay their first month’s premium, a BCBSA spokeswoman said Wednesday.

The new statistics, particularly from such a large carrier, help define how many people are actually getting covered under the Affordable Care Act.

The Blues’ experience is in line with anecdotal estimates from other insurance executives, who indicated earlier in the enrollment process that they received payments from about 80 percent of people who selected their plans.