BERLIN (Reuters) - Higher demand from China, the United States and Europe drove growth in German factory activity to its highest level in more than three years in February, brightening the outlook for Europe’s largest economy, a survey showed on Monday. IHS Markit’s Final Purchasing Managers’ Index (PMI) for manufacturing, which accounts for about a fifth of the economy, jumped to 60.7 from 57.1 in January. It was the highest reading since January 2018 and came in slightly better than the initial “flash” figure of 60.6. Factories have been humming along during the pandemic on higher foreign demand, helping the German economy avoid a contraction in the last quarter of 2020 and offsetting a drop in consumer spending amid a partial lockdown to contain COVID-19. Many manufacturers reported higher demand from Asia, especially China, as well as the United States and European countries, with export sales posting their biggest increase since December 2017, the survey showed. Phil Smith, Principal Economist at IHS Markit, said supply chain pressures intensified as more firms reported delays than ever before in nearly 25 years of data collection. “There looks to be further upward pressure on inflation in the German economy from supply bottlenecks and a subsequent surge in manufacturing input costs,” Smith noted. The survey suggested that supply disruption is making it more difficult to replenish stocks, which could complicate production in the coming months, he cautioned. “Nevertheless, the overriding sentiment for the longer-term outlook is optimism, with a record number of manufacturers expecting to see output rise over the next 12 months.” Still, economists expect the economy to shrink in the first quarter of this year due to a stricter lockdown, which has shut most shops and services since mid-December, and freezing temperatures that slowed construction activity in February.