The classes with the lowest cost per item were cardiovascular system (£4.36); musculoskeletal and joint diseases (£4.96); and gastro-intestinal system (£5.37).
Y dosbarthiadau â'r gost isaf fesul eitem oedd y system gardiofasgwlaidd (£4.36), clefydau'r cymalau a chyhyrysgerbydol (£4.96) a'r system gastroberfeddol (£5.37).