Jewish population by country community saw mass exodus at the end of the 20th century and numbered fewer than 20 in the midst of the Syrian Civil War. The size of the Jewish community in Indonesia has been variously given as 65, 100, or 18 at most over the last 50 years. According to the Jewish Data Bank (Table 4), the 22 countries with the largest core Jewish populations were: Jewish population by country The world's core Jewish population was estimated at 14,511,000 in April 2018, up from 14.41 million in 2016. Demographer Sergio DellaPergola proposes an "extended" Jewish population, including people identifying as
Muslim population growth Muslims. According to Pew Research, religious conversion has no net impact on the Muslim population as the number of people who convert to Islam is roughly similar to those who leave Islam. It is often reported from most recent various sources in 2010, including the German domestic intelligence service, that Salafism is the fastest-growing Islamic movement in the world. Though according to the "World Christian Encyclopedia", published in 2001, the fastest-growing branch of Islam is Ahmadiyya. However, many Muslims consider Ahmadi Muslims as either "kafirs" or heretics.<ref> Muslim population growth Muslim population growth refers to the topic of population growth