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Some 1,200 inmates were described as sharing "squalid, dirty and cramped" living conditions, in "crumbling" cells built for single occupancy in 1851.

The Utah bill requires any new government buildings to include single occupancy bathrooms and asks that the state consider adding more single occupancy bathrooms to increase privacy protections in existing government buildings.

Overcrowding was also raised as a concern by the monitoring board, with most men sharing cells designed for single occupancy.

Archaeologists say that as well as containing a high number of valuable goods, the grave was also a rare example of a single occupancy burial, another sign that it belonged to someone of very high status.

North Dakota had the highest rate of single occupancy, 32.8%.