Useful: we are the least kid society in the EU. Checking data

President Karol Nawrocki signed the bill on the dismissal of parents of at least 2 children from the PIT tax. According to Minister Marcin Przycz from the President's office, this is simply a consequence to the demographic crisis in Poland, due to the fact that we are "at least a kid society throughout the European Union". What does the data say?