Although 85% of world crude production was still coming from Pennsylvania in the 1880s, oil from wells drilled in Russia and Asia began to reach the world market.
Iako je 1880-tih još uvijek 85% ukupne svjetske proizvodnje nafte i dalje dolazilo iz Pennsylvanijskih nalazišta, bušotine u Rusiji i Aziji počele su polako dospijevati na svjetsko tržište.