Considered the biggest, most efficient enterprise in Austria-Hungary, Maryampole was built in six months and employed 1,000 men. Subsequently, investors from Britain, Belgium, and Germany established companies to develop the oil and natural gas industries in Galicia. This influx of capital caused the number of petroleum enterprises to shrink from 900 to 484 by 1884, and to 285 companies manned by 3,700 workers by 1890. However, the number of oil refineries increased from thirty-one in 1880 to fifty-four in 1904. By 1904, there were thirty boreholes in Borysław of over 1,000 meters. Production increased by 50% between 1905 and 1906 and then trebled between 1906 and 1909 because of unexpected discoveries of vast oil reserves of which many were gushers. By 1909, production reached its peak at 2,076,000 tons or 4% of worldwide production. Often called the "Polish Baku", the oil fields of Borysław and nearby Tustanowice accounted for over 90% of the national oil output of the Austria-Hungary Empire. From 500 residents in the 1860s, Borysław had swollen to 12,000 by 1898. At the turn of the century, Galicia was ranked fourth in the world as an oil producer. This significant increase in oil production also caused a slump in oil prices. A very rapid decrease in oil production in Galicia occurred just before the Balkans conflicts.