In terms of denomination, the overwhelming majority (99%) adheres to Sunni Islam, while there are around 1-3 million Shias (1%), who are concentrated around Jakarta, and about 400,000 Ahmadi Muslims (0.2%). In terms of Islamic schools of jurisprudence, based on demographic statistics, 99% of Indonesian Muslims mainly follow the Shafi'i school, although when asked, 56% does not adhere to any specific school. Trends of thought within Islam in Indonesia can be broadly categorized into two orientations; "modernism" which closely adheres to orthodox theology while embracing modern learning, and "traditionalism" which tends to follow the interpretations of local religious leaders and religious teachers at Islamic boarding schools ("pesantren"). There is also a historically important presence of a syncretic form of Islam known as "kebatinan".