The World Christian database is updated twice a year, generally in January and July.
WCD is now updated from mid-2000 data to current data projections from mid-2005...
The World Christian Database and the World Christian Encyclopedia are world-renowned for their content quality and comprehensive view on religious statistics.
Data on 18 categories of religion, including non-religious, by country, province, and people.
Data on all religions, Christian activities, and trends.
Membership data, year begun, and rates of change.
Population and religion data on all major cities & provinces.
Detailed information covering religion, culture, and geography.
A repository of historical data, including a chronology of Christianity from the 1st to 21st centuries.