Input (grade 0): The area of Castletown is made up of 99.3% white, 0.4% Asian and 0.2% mixed-race.
Output (grade 2): Ethnicity 98.1% of the population are white, with 1% Asian and 0.4% mixed-race. Here, 89.4% are white, 7.8% are Asian and 1.3% are mixed-race.