Russia overtook Saudi Arabia as the world’s largest crude producer in December, when both countries started restricting supplies ahead of agreed cuts with other global producers to curb the worst glut in decades. Russia pumped 10.49 million barrels a day in December, down 29,000 barrels a day from November, while Saudi Arabia’s output declined to 10.46 million barrels a day from 10.72 million barrels a day in November, according to data published Monday on the website of the Joint Organisations Data Initiative in Riyadh.