Date of Enumeration.	Empty Houses.	Unfinished Houses.
1842*, 1 January	207	602
1846, 1 January	95	573
1851, 1 March	33	561
1857, 31 March	122	623
1861, 7 April	944	83
1870, 7 February	2,145	170
1881, 3 April	1,533	133