Open enrollment for health insurance ended Sunday. The Washington Health Benefit Exchange (HBE) has only provided approximate enrollment numbers: “Nearly” 160,000 renewed coverage or enrolled for the first time during the open enrollment period. Of those, “more than” 66,000 were new enrollees, meaning that renewals were not more than 94,000.

They did get a bounce in enrollments during February (in the chart, the enrollments reported Feb. 16 are for 15 days only, while those reported Feb. 5 are for the entire month of January). But the HBE made only about 77.6 percent of its goal for new enrollees (85,000) and about 72.3 percent of its goal for renewals (130,000). This has implications for its budget, which depends partially on a tax on plans bought through the Exchange.

As the Seattle Times points out, after open enrollment last year, 164,000 had purchased insurance through the Exchange. One reason they may not have matched that number is affordability:

The amount available in tax subsidies is pegged to the price of the second-cheapest silver plan sold in a customer’s geographic area. That price decreased across Washington, so the subsidies shrank, too. The precise amount a person receives is determined by his or her income.

Monthly premiums for exchange plans rose a modest 2 percent for 2015. But insurance prices also go up each year according to a customer’s age.

Despite the exchange’s better showing last year, it appears that costs were a struggle then as well. Slightly more than half of the exchange customers missed at least one month’s payment last year. And by the end of December, roughly 44,000 had outstanding balances on their accounts.