A stunning 10% of Cuba’s population — more than a million people — left the island between 2022 and 2023, the head of the country’s national statistics office said during a National Assembly session Friday, the largest migration wave in Cuban history.

The data confirmed reporting by the Miami Herald and Cuban independent media that sounded the alarm over the mass migration of Cubans amid a severe economic downturn and a government crackdown on dissent in recent years.

According to the official figures made public for the first time, Cuba’s population went from 11,181,595 on Dec. 31, 2021, to 10,055,968 on December 2023.