evidence: Due to this, in the second half of the 19th century the population of England continued to grow quickly from 16.8 million in 1851 to 30.5 million in 1901.[9] This rapid growth was also seen in the other constituent nations. In Wales, the population increased from 0.6 million in 1801 to 2 million in 1901, in Scotland, the population increased from 1.6 million to 4.5 million in 1901. In contrast however and due to the Great Irish Famine, which began in the 1840s, caused the deaths of 1 million Irish people, and caused well over a million to emigrate.[9][27] Mass emigration became entrenched as a result of the famine, and Ireland's population decreased rapidly, from 8.2 million in 1841 to 3.2 million in 1901.[9][28] However this massive population collapse did not effect Northern Ireland to the same extent, due to being more industrialised and urbanised and while the population did decline, it had recovered itself by the beginning of the 20th century.[9] This prolonged period of emigration and net population decline in Irish history was only reversed by the middle of the 20th century.[28] [...] - ^ a b "Ireland – Population Summary". Homepage.tinet.ie. Retrieved 31 July 2012.