A method of generating a quantitative indicator of sales for a market segment for a predetermined time period is disclosed. The market segment represents a plurality of members with one or more products. The method includes receiving sales data from the plurality of members of the market segment, calculating the quantitative indicator for each member of the market segment, calculating the quantitative indicator for the market segment by creating a composite of the quantitative indicator for each member representing the market segment, and either calculating the quantitative indicator for the member with missing data using a estimated value of units of the product sold by the member or modifying the baseline benchmark by removing the data of the member with missing data.