Human capital is fleeing Russia. Since President Vladimir Putin’s ascent to the presidency, between 1.6 and 2 million Russians – out of a total population of 145 million – have left for Western democracies. This emigration sped up with Putin’s return as president in 2012, followed by a weakening economy and growing repressions. It soon began to look like a politically driven brain drain, causing increasing concern among Russian and international observers.
https://www.atlanticcouncil.org/publications/reports/putin-exodus