This indicator provides the share of housing units that are multi-family in the neighborhood where the average child lives. For instance, if the value is 10%, this statistic is interpreted as "The average child in this metro area lives in a neighborhood where 10% of the housing units are multi-family."
Children are those under 18.
U.S. Census Bureau, 2000 Census, Summary File 3 accessed through the Neighborhood Change Database. U.S. Census Bureau, 2000 Census, Summary File 1.