SubscribersStringGrid.ColWidths[0] :=  Round(FrameWidth / SUR_COL_COEF);
   SubscribersStringGrid.ColWidths[1] :=  Round(FrameWidth / NUM_COL_COEF);
   SubscribersStringGrid.ColWidths[2] :=  Round(FrameWidth / YEAR_COL_COEF);