In Manhattan , the number of food stores that are 5,000 square feet or larger has actually grown in the last decade , to 196 from 154 , because markets are turning up in neighborhoods that were previously underserved , according to Lawrence Sarf , the president of F & D Reports , a retail consulting company in Great Neck , N.Y . But , he said , the proportion of markets on the Upper West Side , Upper East Side and Midtown had declined to about 30 percent of the total , from 70 percent .