among families of
one to five persons , with monthly income ranging from Baht 3,000 to Baht 15,000
4/ Weights and selected items are derived from a
socio-economic survey conducted in sanitary districts in 2002
among families ot tow or more persons
but not over six, with monthly income ranging from Baht 2,000 to baht 25,000. Source : Bureau of Trade and Economic Indices, Ministry of Commerce