Table A2-40 First-Class Mail -- Personal Letters and Cards (not greeting cards) Sent by  Households in an Average Month -- by Education of Head of Household Postal Fiscal Years 1987, 2006 and 2007 (Recruitment and Diary Data)
Education	Pieces Per Household Per Month
	Recruitment Interview � (Perceived volume)			Diary Data (Actual Volume)
	1987	2006	2007	1987	2006	2007
< 8th grade	3.8	4.3	4.6	1.2	0.9	1.3
Some high school	4.4	4.1	4.4	2.2	0.4	0.7
High school	4.2	3.8	4.4	2.2	0.7	0.8
Some college	5.1	4.0	4.7	2.4	0.9	0.8
Professional or technical school	5.4	4.4	4.6	2.3	1.5	0.8
College	5.5	4.0	4.8	5.1	1.2	1.0
Post graduate	6.4	4.4	5.3	5.9	1.4	1.4
� Includes thank you notes.