The maximum pre-war figure was reached in 1913 with a total of 191,500,000 tons.

Of this, 19,000,000 tons were consumed at the mines, and on balance (_i.e._ exports less imports) 33,500,000 tons were exported, leaving 139,000,000 tons for domestic consumption.

It is estimated that this total was employed as follows:-- Railways 18,000,000 tons.
Gas, water, and electricity 12,500,000 " Bunkers 6,500,000 " House-fuel, small industry and agriculture 24,000,000 " Industry 78,000,000 " -- --------- 139,000,000 " The diminution of production due to loss of territory is:-- Alsace-Lorraine 3,800,000 tons.
Saar Basin 13,200,000 " Upper Silesia 43,800,000 " -- --------- 60,800,000 " There would remain, therefore, on the basis of the 1913 output, 130,700,000 tons, or, deducting consumption at the mines themselves, (say) 118,000,000 tons.

For some years there must be sent out of this supply upwards of 20,000,000 tons to France as compensation for damage done to French mines, and 25,000,000 tons to France, Belgium, Italy, and Luxemburg;[43] as the former figure is a maximum, and the latter figure is to be slightly less in the earliest years, we may take the total export to Allied countries which Germany has undertaken to provide as 40,000,000 tons, leaving, on the above basis, 78,000,000 tons for her own use as against a pre-war consumption of 139,000,000 tons.
This comparison, however, requires substantial modification to make it accurate.

On the one hand, it is certain that the figures of pre-war output cannot be relied on as a basis of present output.