Percentages of Gaelic speakers (mono- and bilingual) in Scotland in successive census years, 1891–2001. Data for civil parishes: 1891–1971 from Withers (1984, pp. 227–234); 1981 from Withers (1988, p. 40); 1991–2001 from General Register Office for Scotland (2005, table 3). Red, 75–100% Gaelic speaking; orange, 50–74.9% Gaelic speaking; yellow, 25–49.9% Gaelic speaking; white, less than 25% Gaelic speaking.