By Richard Horgan Los Angeles (Knewz) — According to the latest U.S. Census data, 99.5 percent of children under age 18 in a coupled household lived with an opposite-sex couple. But within that remaining half-percent, there was a dominant trend. Four in five children, or 79 percent, living with a same-sex couple are doing so with two female parents. And three states – Maine, Massachusetts and Washington, along with the District of Columbia – have a significantly greater share of these couples than the national average. At the other end of the statistical scale, there are 11 states with signifi…