Atlantic City’s casinos have seen their gross operating profit increase by nearly 20 percent in the first six months of this year. Figures released Tuesday by the New Jersey Division of Gaming Enforcement also show the seven casinos reported a collective second-quarter profit of $169.3 million, compared with $145.7 million in 2016. That’s an increase of 16.2 percent. New Jersey Casino Control Commission Chairman Matt Levinson noted that this is the third consecutive quarter that the casinos have reported double-digit growth. The data shows gross operating profits for the year are up 19.1 percent to $308.6 million. Gross operating profit reflects earnings before interest, taxes, depreciation and other charges. It’s a widely accepted measure of profitability in the gambling industry.