Religion in the Czech Republic
In the Czech Republic, 47.8% of the population is irreligious (atheist, agnostic or other irreligious life stances), while 21.3% of the population are believers. The religious identity of the country has changed drastically since the first half of the 20th century, when more than 90% of Czechs were Christians.
Source: Wikipedia — Religion in the Czech Republic (CC BY-SA 4.0)