Table A3-15 Standard Mail -- Mail Order Industry Shape by Familiarity With Organization  (Percentage of Mail Pieces Received by Households) Postal Fiscal Years 1987, 2006 and 2007 (Diary Data)
Familiarity	Letter Size Envelope			Larger Than Letter Size Envelope			Catalog Not In Envelope			Flyers �
	1987	2006	2007	1987	2006	2007	1987	2006	2007	1987	2006	2007
Previous customer	46.6	47.8	50.8	52.9	56.8	52.4	53.0	58.0	58.7	42.0	46.8	53.9
Organization known	17.1	21.1	22.5	15.4	12.8	19.6	18.8	16.8	17.1	15.5	13.9	16.6
Organization unknown	27.3	20.8	15.3	19.8	15.8	15.1	20.7	12.4	13.6	29.7	20.6	19.0
Don't know/No answer	9.0	10.4	11.4	11.9	14.6	12.9	7.5	12.8	10.6	12.8	18.6	10.5
Total	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Note: Totals may not sum to 100 due to rounding.
� Fluctuations may be due to small sample size.