1 The Religious Characteristics of States Dataset Project: Demographics reports annual estimates of religious demographics, both country by country and region by region. It estimates populations and percentages of adherents of 100 religious denominations including second level subdivisions within Christianity and Islam. The RCS Data Project would like to acknowledge, recognize, and express our deepest gratitude for the significant contributions of Todd M. Johnson, the principal investigator of the World Christian Database, the co-principal investigator of the World Religion Database, and co-author of the World Christian Encyclopedia series.
