The REIMS II data did not identify the volume of cards. Because there are inbound cards, the Commission assumed that the relationship between U.S. outbound cards and the total volume of outbound Air LC/AO mail applies to inbound mail Air LC/AO.
REIMS II data didn't identify card volume. The Commission assumed the relationship between U.S. cards & the total volume of outbound Air LC/AO mail applies to inbound mail.