Premise: They are identical to Tables 1, 2 and 3 respectively, except that the total annual volumes in Tables 1, 2 and 3 have been replaced with per-household annual volumes in Tables 4, 5 and 6. A comparison of figures in Tables 4, 5, and 6 with the corresponding figures in Tables 1, 2 and 3, respectively, shows that the replacement of total by per-household volume figures leaves the shares of sectors and uses in total First-Class Mail volume unchanged.

Hypothesis: They are identical to figure 1 
Relation: neutral