 This includes staff spread over seven days, and reflects the high preponderance of part-timers typical of the industry.The decrease in staff occurred despite the onset of Sunday openings and the increase in door-count and issues because, at least in part, amalgamation allowed the centralisation of many departments, such as cataloguing.The onset of computers has also increased efficiency, even to the near complete automation of some services, such as circulation through self-issue machines, which recorded 40% of items borrowed within their first months of installation at Birkenhead in 1995.