Table A3-21 Standard Mail Treatment by Usefulness (Percentage of Pieces) Postal Fiscal Years 1987, 2006 and 2007 (Diary Data)
Treatment	Usefulness
	Useful			Interesting			Not Interesting
	1987	2006	2007	1987	2006	2007	1987	2006	2007
Read	68.0	68.3	69.2	20.2	15.8	14.1	7.0	12.3	13.1
Looked at	24.4	19.1	19.0	36.5	20.2	20.9	21.5	53.8	54.5
Discarded	4.5	3.9	4.6	12.9	6.6	6.9	66.0	78.2	78.4
Set aside	58.2	70.5	72.2	25.6	16.3	14.3	8.4	8.4	8.7
Treatment	Usefulness
	Objectionable			Don't Know/No Answer			Total
	1987	2006	2007	1987	2006	2007	1987	2006	2007
Read	2.2	2.9	3.2	2.6	0.6	0.3	100.0	100.0	100.0
Looked at	5.2	6.6	4.9	12.4	0.3	0.6	100.0	100.0	100.0
Discarded	12.9	10.5	9.8	3.7	0.7	0.4	100.0	100.0	100.0
Set aside	4.6	4.4	4.1	3.2	0.4	0.7	100.0	100.0	100.0
Note: Percents are row percentages within each Treatment category.
Totals may not sum to 100 due to rounding.