Finally, Columns (5), (8), and (11), labeled Annual Growth show the annual volume growth rates of all sectors and total First-Class Mail for the time periods 1987-90, 1990-93 and 1993-97, respectively.
Column (14) shows the growth of the sectors in Second Class Mail.
mnli hypothesis: Column (14) shows the growth of the sectors in Second Class Mail. premise: Finally, Columns (5), (8), and (11), labeled Annual Growth show the annual volume growth rates of all sectors and total First-Class Mail for the time periods 1987-90, 1990-93 and 1993-97, respectively.