The number of churches has grown from 100 in 1974 to over 800 in 1994, with Church membership having grown considerably under Indonesian rule as ''Pancasila'', Indonesia's state ideology, requires all citizens to believe in one God and does not recognise traditional beliefs. East Timorese animist belief systems did not fit with Indonesia's constitutional monotheism, resulting in mass conversions to Christianity. Portuguese clergy were replaced with Indonesian priests and Latin and Portuguese mass was replaced by Indonesian mass. While just 20% of East Timorese called themselves Catholics at the time of the 1975 invasion, the figure surged to reach 95% by the end of the first decade after the invasion. In rural areas, Roman Catholicism is syncretised with local animist beliefs. With over 95% Catholic population, East Timor is currently the second most densely Catholic country in the world, after the Vatican.