While it is unclear what prompted their arrival they may have been the children of Australian Protestant missionaries who began work in Korea around 1885.[3] Additionally, scant evidence of individual Koreans living in areas of Australia like Broome in the years prior to the Second World War has also been recorded.[6] The relaxation of immigration restrictions in the late 1960s provided the first opportunity for larger numbers of Koreans to enter Australia.Few ethnic groups are as concentrated in one state as Koreans are in New South Wales, where 33% of Australia's population live.[8] 41,316 (40.5%) Korean-born Australian residents self-identified as "No Religion," 19,400 (18.7%) as Presbyterian or Reformed, 17,156 (16.8%) as Catholic, 6,506 (6.4%) as Uniting Church, and 4,244 (4.2%) as "Christianity, not further defined.