The city's first Welsh-language school (Ysgol Gymraeg Bryntaf) was established in the 1950s, and Welsh has since regained ground. Aided by Welsh-medium education and migration from other parts of Wales, there are now many more Welsh speakers: their numbers doubled between the 1991 and 2011 censuses, from 18,071 (6.6%) to 36,735 (11.1%) residents aged three years and above. The LSOA (Lower Layer Super Output Area) with the highest percentage of Welsh speakers in the city centre is found in Canton, at 25.5%. The LSOA with the highest percentage of Welsh speakers in the whole of Cardiff is Whitchurch, at 26%.