Household mail is defined as the sum of mail in the above three sectors and is shown as Subtotal in Table 1 . Its annual growth rate fell from 6.6 percent in 1987-90 to 0.7 in 1990-93 and further to negative 1.4 percent in 1993-97 .
Household mail is the sum of mail in three sectors which totals about 5,000,000 pieces of mail a month .