In the 1870s, the vast majority of the iron ore, steel, and pig iron were being produced in Ukraine. Comparatively, Ukraine with its large deposits and developed industry, was responsible for 75% of the iron ore in 1913 to the Ural's 21%. Ukraine remained the focal point of metal production while the competing regions found themselves relegated to significantly reduced importance. It was only following the Bolshevik Revolution in 1917 that the drive to push for an expanded iron and steel industry began to come to the forefront.