... the first language of most of the younger Aboriginal and Islander people [in] the Cape York communities of Bamaga, Seisa, Umagico (Alau), Injinoo (Cowal Creek) and Mandingu (New Mapoon) (Shnukal, 2004:7).
Speaker numbers were measured differently across the censuses and various other sources listed in AUSTLANG. You are encouraged to refer to the sources.
Speaker numbers for ‘NILS 2004’ and ‘2005 estimate’ come from 'Table F.3: Numbers of speakers of Australian Indigenous languages (various surveys)' in 'Appendix F NILS endangerment and absolute number results' in McConvell, Marmion and McNicol 2005, pages 198-230 (PDF, 2.5MB).
Shnukal, Anna. 1994. Torres Strait Creole. In Macquarie Aboriginal words: a dictionary of words from Australian Aboriginal and Torres Strait Islander languages, eds. N Thieberger and W McGregor, 374-398. North Ryde: Macquarie Library.