(GENEVA, Switzerland) — The U.N. refugee agency said Thursday that 1 million people have now fled Ukraine since Russia’s invasion less than a week ago, an exodus without precedent in this century for its speed.

The tally from the U.N. High Commissioner for Refugees amounts to more than 2% of Ukraine’s population — which the World Bank counted at 44 million at the end of 2020 — on the move across borders in just seven days.