The Chief Local Government Auditor reports on absenteeism based on data requested from the 26 councils on an annual basis. The data is analysed over a three year period to counter the impact of annual fluctuations in absenteeism which could distort findings particularly within smaller councils. In 2009-10, Northern Ireland councils employed over 9,800 staff at a cost of £299 million. Staff costs account for 42% of the councils' expenditure. The report sets out a number of main findings and recommendations, including: Northern Ireland councils as a whole lost almost 122,000 days to absenteeism in 2009-10, an increase of around 700 days compared to 2008-09; there is a resultant absenteeism rate of 12.39 days for each full time equivalent employee which reflects a marginal reduction of 0.04 days. This absenteeism rate for all Northern Ireland councils is now lower than any annual rate recorded this decade with a reduction of 16%. Stress, depression, mental health and fatigue remains the largest cause of days lost due to absenteeism, responsible for 22% of days lost in 2009-10, down 1% from 2008-09. As in previous reports, the NIAO recommends that councils with high and rising absenteeism rates should review their own management practices and benchmark these against those councils with low and falling absenteeism rates. In general there was an improvement in the quality of absenteeism data presented by the councils.