anchor: This drop in payment mail volume accounts for 69 percent of the decline in the volume of HH-to-NHH sector, amounted to 3.6 billion pieces between 1990 and 1997 (see Table 1).
positive: This drop in payment mail volume amounted to 3.6 billion pieces.
negative: This drop in payment mail volume accounts for 4 percent of the decline in the volume.