From the outset, the Ottoman Army faced a host of problems in assembling itself. First of all, the size of the Ottoman Army was severely limited by division within the empire: non-Muslims were exempt from the military draft, and reliable ethnic Turks made up only 12 million of the empire's already relatively small population of 22 million, with the other 10 million being minorities of varying loyalty and military use. The empire was also very poor compared to the other powers in GDP, infrastructure, and industrial capacity. As a point of comparison the empire had only 5,759 km of railway, while France had 51,000 km of railway for a fifth of the land area. Ottoman coal production was negligible (826,000 tons in 1914 compared to 40,000,000 tons for France and 292,000,000 tons for Britain), while steel production was borderline non-existent. There was only one cannon and small arms foundry in the empire, a single shell and bullet factory, and a single gunpowder factory, all of which were located in the Constantinople suburbs. The Ottoman economy was almost entirely agricultural, relying on products such as wool, cotton, and hides.