Three indigenous Celtic languages are spoken in the UK: Welsh, Irish and Scottish Gaelic. Cornish, which became extinct as a first language in the late 18th century, is subject to revival efforts and has a small group of second language speakers. In the 2011 Census, approximately one-fifth (19 per cent) of the population of Wales said they could speak Welsh, an increase from the 1991 Census (18 per cent). In addition, it is estimated that about 200,000 Welsh speakers live in England. In the same census in Northern Ireland 167,487 people (10.4 per cent) stated that they had "some knowledge of Irish" (see Irish language in Northern Ireland), almost exclusively in the nationalist (mainly Catholic) population. Over 92,000 people in Scotland (just under 2 per cent of the population) had some Gaelic language ability, including 72 per cent of those living in the Outer Hebrides. The number of children being taught either Welsh or Scottish Gaelic is increasing. Among emigrant-descended populations some Scottish Gaelic is still spoken in Canada (principally Nova Scotia and Cape Breton Island), and Welsh in Patagonia, Argentina.