CONCORD, N.H.— The latest New Hampshire enrollment figures for President Barack Obama’s health care overhaul law show Anthem Blue Cross and Blue Shield with 60 percent of the individual market.

The New Hampshire Insurance Department recently began requiring insurance companies selling plans through the marketplace to submit monthly enrollment numbers.

Anthem was the only company offering marketplace plans last year, but this year it was joined by four other companies. According to the latest numbers, a total of 45,504 people had signed up for plans in New Hampshire by April 1, and 60 percent of them chose Anthem plans. Just under 16 percent chose Minuteman Health, about 15 percent chose Harvard Pilgrim and just under 9 percent chose Maine Community Health. Assurant Health had less than 1 percent of the total.

While thousands individuals have signed up, employers have been slow to use the insurance market for small businesses.

The Small Business Health Options Program, also called SHOP, is available to companies with 50 employees or fewer. It opened last year, but technology problems hampered its debut, and it wasn’t available online until recently. In January, only 36 businesses had signed up for plans covering 262 employees and family members. By the end of March, that had increased to 215 businesses covering 1,769 employees and family members. More than three-quarters of the companies chose Maine Community Health. Eighteen percent chose Anthem, with Harvard Pilgrim and Minuteman each picking up a handful of small group customers.