Now let us turn to columns in Table 1. Columns (1), (3), (6), and (9), labeled Volume show, in millions, the total First-Class Mail pieces broken-down by sector for FYs 1987, 1990, 1993 and 1997, respectively.
384435
Columns 1,3,6, and 9 show first-class mail by sectors for years 1987-1997.
384436
The amount of mail is shown in thousands.