Since 1885, housing was a major concern for residents of Glasgow, in particular those who relied on tenement housing for shelter. These residents were primarily men who worked in industrial labor and their families. Glasgow received an influx of roughly 70,000 new residents in the three years leading up to 1915. The city did not respond with enough new housing and in fact built fewer than two thousand tenements to meet this need, which created high demand for a small number of apartments. By this time, Glasgow had become the most overcrowded city in Britain.