From top of the chart to bottom
1st level is Canada, number 12
2nd level is Provinces and territories, number 11
3rd level is either City totals, number 8 or Rural Postal Codes, number 9 and Other areas in province, number 10
Under City totals, there are 5 levels of geography which are:
Urban FSAs, number 3
Rural Routes, number 4
Suburban services, number 5
Rural postal codes in city, number 6
Other urban areas, number 7
Under Urban FSA, there are 2 levels of geography which are:
Postal Walks, number 1
Walk Pots, number 2