<Tr> <Th> Census </Th> <Th> Pop . </Th> <Th> </Th> <Th>% ± </Th> </Tr> <Tr> <Td> 1951 </Td> <Td> 180,823 </Td> <Td> </Td> <Td>--</Td> </Tr> <Tr> <Td> 1961 </Td> <Td> 3,250,227 </Td> <Td> </Td> <Td> 1697.5% </Td> </Tr> <Tr> <Td> 1971 </Td> <Td> 3,812,325 </Td> <Td> </Td> <Td> 17.3% </Td> </Tr>

Which individual helped spread buddhism to areas outside of india