| Table A2-24 First-Class Mail -- Nonpresort Envelopes by Sector (Percentage of Total Envelopes) Postal Fiscal Years 1987, 2006 and 2007 (Diary Data) |
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| Sector | 1987 | 2006 | 2007 | |||
| Household-to-household | 12.5 | 12.7 | 12.2 | |||
| Household-to-nonhousehold | 17.3 | 30.5 | 34.0 | |||
| Nonhousehold-to-household | 25.2 | 30.5 | 31.3 | |||
| Unidentified incoming | 0.5 | 2.5 | 2.1 | |||
| Unidentified outgoing | 2.5 | 1.9 | 2.3 | |||
| Subtotal | 58.0 | 78.1 | 81.8 | |||
| Nonhousehold-to-nonhousehold | 42.0 | 21.9 | 18.2 | |||
| Total | 100.0 | 100.0 | 100.0 | |||
| Base: RPW Total, First-Class Envelopes. | ||||||
| Note: Totals may not sum due to rounding. | ||||||