Table A3-12 Standard Mail by Familiarity With Institution (Percentage of Mail Pieces Received by Households) Postal Fiscal Years 1987, 2006 and 2007 (Diary Data)
Familiarity	1987	2006	2007
Previous customer	47.5	51.2	54.4
Organization known	17.4	22.0	22.2
Organization unknown	18.1	14.4	14.1
Don't know/No answer	17.1	12.4	9.3
Total Received	100.0	100.0	100.0
Note: Totals may not sum to 100 due to rounding.