= 24 million tones oil = 37 million tones coal per day = 2 700 million ft3 gas = 470 000 barrels oil 100 MMcf Natural Gas per Day per year = Tcf (37 trillion Btu) = 1 mrd m3 gas ( mrd Groningen) = 860 000 tones oil = 770 000 tones LPG = 700 000 tones LNG = million tones coal per day = million m3 gas (3 million Groningen)