<Tr> <Th> 1789 </Th> <Td> 1,200,000 </Td> <Td>--</Td> </Tr> <Tr> <Th> 1827 </Th> <Td> 889,584 </Td> <Td> − 25.9% </Td> </Tr> <Tr> <Th> 1871 </Th> <Td> 2,400,380 </Td> <Td> + 169.8% </Td> </Tr> <Tr> <Th> 1881 </Th> <Td> 2,759,738 </Td> <Td> + 15.0% </Td> </Tr>

What was the ethnic composition of sri lanka