More law firms earned a perfect score than companies in any other industry on a survey that tracks how well employers protect their lesbian, gay, bisexual and transgender (LGBT) workers.

Of the 156 law firms included in the Corporate Equity Index survey, which was released Monday by the Washington, D.C.-based Human Rights Campaign (HRC), 112 received perfect scores, up from 95 last year. Another 14 firms scored 95 out of 100, while nine earned scores of 90 and 14 received scores of 85. Only four firms earned below a score of 80.