Table A4-9 Treatment of Mail Advertising by Age of Head of Household (Percentage of Households) Postal Fiscal Years 1987, 2006 and 2007 (Recruitment Data)
Treatment	18 - 21�			22 - 24 �			25 - 34			35 - 44
	1987	2006	2007	1987	2006	2007	1987	2006	2007	1987	2006	2007
Usually read	39.4	14.1	9.6	21.1	21.2	21.3	20.3	13.2	14.8	17.7	12.6	12.3
Usually scan	38.8	28.7	35.6	46.7	29.0	27.8	41.4	33.5	33.8	40.8	32.4	35.3
Read some	12.6	25.0	21.1	24.8	23.3	32.0	30.7	33.7	28.9	30.8	34.5	32.6
Usually don't read	3.2	19.3	33.7	6.7	22.6	18.8	6.3	15.9	21.9	9.8	17.6	19.6
Don't know/No answer	0.2	13.0	0.0	0.0	4.0	0.0	0.3	3.7	0.6	0.0	2.8	0.2
Received no advertising	5.8	N/A	N/A	0.7	N/A	N/A	1.0	N/A	N/A	0.9	N/A	N/A
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
Treatment	45 - 54			55 - 64			65 - 69			70+		70 - 74	75+
	1987	2006	2007	1987	2006	2007	1987	2006	2007	1987	2006	2007	2007
Usually read	17.0	14.4	15.8	19.7	14.5	16.3	23.6	15.3	16.5	19.5	17.4	18.4	21.6
Usually scan	41.3	35.3	30.2	39.4	34.0	32.1	37.9	36.8	32.1	38.2	36.7	36.5	32.1
Read some	31.9	31.8	34.0	28.2	32.2	33.0	26.4	31.5	31.0	30.0	26.7	29.5	27.9
Usually don't read	9.2	16.2	19.8	11.6	17.2	18.6	9.4	14.4	20.3	11.8	16.1	15.6	18.0
Don't know/No answer	0.3	2.4	0.2	0.0	2.2	0.0	0.7	2.0	0.0	0.0	3.1	0.0	0.4
Received no advertising	0.3	N/A	N/A	1.1	N/A	N/A	2.0	N/A	N/A	0.5	N/A	N/A	N/A
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	100.0
� Fluctuations may be due to small sample sizes.
Note: Totals may not sum to 100 due to rounding.