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Mining of hard coal

Mining of lignite

Extraction of crude petroleum

Extraction of natural gas

Mining of iron ores

Mining of uranium and thorium ores

Mining of tin ores

Mining of zinc ores

Mining of other non-ferrous metal ores, not elsewhere classified

Mining of precious metals

Quarrying of building stone

Quarrying of limestone, gypsum, chalk and unclacined dolomite

Extraction gravel and sand

Mining of clay

Mining of chemical and fertilizer minerals

Extraction of peat

Extraction of rock salt

Extraction of sea salt

Mining of precious and semi-precious stones

Other mining and quarrying, not elsewhere classified

Support activities for petroleum and natural gas extraction