Table A2-19 First-Class Mail -- Total Envelopes by Sector (Percentage of Pieces) Postal Fiscal Years 1987, 2007 and 2008 (Diary Data)					YEAR	_TYPE_	_FREQ_	A221ROW1	A221ROW3	A221ROW4	A221ROW2	A221ROW5	I
					2007	0	62109	4.613019	41.1713	2.19101			6
					2008	0	57541	5.960532	45.4472	3.02969			6
					2007	0	17729				15.1275	1.00445	6
					2008	0	16525				15.6454	1.48187	6
Sector	1987	2007	2008
Household-to-household	9.4	4.6	6.0
Household-to-nonhousehold	12.3	15.1	15.6
Nonhousehold-to-household	39.2	41.2	45.4
Unidentified incoming	0.6	2.2	3.0
Unidentified outgoing	1.4	1.0	1.5
Subtotal	62.9	64.1	71.6
Nonhousehold-to-nonhousehold	37.1	35.9	28.4
Total	100.0	100.0	100.0
Note: Totals may not sum due to rounding.
Base: RPW Total, First-Class Envelopes.