MDA DataQuick. The San Diego firm tracks real estate trends nationally via public property records. The number of homes sold in May was the lowest for that month since at least 1994, when DataQuick's complete (all home types) Portland region sales statistics begin. The May total marked the 39th consecutive month in which total sales have fallen on a year-over-year basis. Portland region sales have been the lowest on record for that particular month for the last 13 consecutive months.