Definition
Cooking fuel is fuel used by the majority of the population in the rural / urban.
City Gas / Liquid Petroleum Gas (LPG) is the LPG gas and city gas from the gas company.
Kerosene: quite clear
Firewood: pretty obvious.
Others, such as charcoal, husk, shell, coal briquettes and biogas.
When most people cook with two or more types of fuel with the same percentage, then the selected code is the code of the smallest fuel.