President Donald Trump has frequently been accused of trying toundermine Obamacare, his predecessor’ssignature health law. New data show that by at least one measure hedidn’t do a particularly good job of it.

Enrollment in individual health-insurance plans under theAffordable Care Act fell 3.7 percent in 2018 to 11.8 million, from12.2 million a year earlier, according to data compiled by theNational Academy for State Health Policy, which calls itself anonprofit, nonpartisan association of state health-policymakers.

That’s a far smaller drop than some health-policy watchers hadforeseen, after the Trump administration halved the enrollment season and cut marketingand enrollment-assistance efforts. Trump himselfdeclared the law “dead.”

The decline was concentrated in states where the federalgovernment runs the Obamacare markets. In those 34 states,enrollment dropped 5.3 percent.

In states that handle their own systems and advertising, likeNew York, Colorado and California, sign-ups were essentially flat.States that run their own markets also typically offered longersign-up periods.

Despite the smaller-than-expected decline, enrollment in theACA’s exchanges has fallen from a peak of about 12.7 million in2016, and the overall individual market has turned out to besmaller than estimated when the health law was passed.

One reason the numbers haven’t gone up may be that people arestill getting coverage through their jobs in high numbers. When thehealth law was passed, policy experts predicted that some companieswould quit offering coverage, sending workers to the Obamacaremarket.

Instead, companies continued offering insurance to their workersas a job benefit. A strengthening labor market may also have helpedpull some people out of the ACA’s exchanges. More than 2 millionmore people were employed in January compared to a yearearlier.

While premiums climbed, the overall effect on enrollment isunclear. On average, the sticker price of the cheapest plans rose17 percent, accordingto the Kaiser Family Foundation. That likely drove some people toowealthy to get subsidies away from the market. But becausesubsidies rise alongside premiums, lower income consumers wereinsulated from the price hikes.

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