The procedure is simple. We consider only QSOs that meet the following criteria:
- marked as "two-way" QSOs (i.e., both parties submitted a log containing the QSO);
- no callsign or zone is bust by either party.
Separate figures are provided for each band, led by a figure integrating QSOs on all bands. The figures are constructed in such a way as to show the results for both the SSB and CW contests on a single figure. (A zone pair with no QSOs that meet the above criteria appears in black on the figures.)