The overall increase was mainly due to increases in one-person and two-person households, which remained the most common household types in Wales, based on these estimates.
Roedd y cynnydd cyffredinol yn bennaf o ganlyniad i aelwydydd un-person a dau-berson, sy'n parhau i fod y mathau mwyaf cyffredin o aelwyd yng Nghymru, yn seiliedig ar yr amcangyfrifon hyn.