The value of black market labour in Italy has increased by at least one per cent of GDP over the last decade, according to the latest figures from Italys national institute for statistics, Istat. The level of undeclared work has risen steadily since 1992 and by 2003 was reckoned to be worth 200 billion representing a failure on the part of police and government to get to grips with a clear and chronic problem. An estimate for 2003 said there were 594,000 illegal workers in the north-west, 492,000 in the north-east, 618,000 in the centre and 1,535,000 in the south, with Calabria singled out as the main culprit. The black market for labour is most prevalent in the agricultural, service and industrial sectors, respectively accounting for 36.4 per cent, 19.4 per cent and 10 per cent of total revenue.