The National Statistical System (Sistan) is a network of about 10.000 statistical operators, working together to provide Italy as well as all the subjects interested in the Italian situation with high quality statistical information. Within the framework of the National Statistical Programme, one thousand direct surveys or data processing projects - both at national and local level- are carried out every year. Sistan assures a uniform direction, homogeneous methods and rationalised processes for official statistics, through an organisational and functional co-ordination plan, that involves the whole Public Administration at central, regional and local levels. According to the law, Istat, the Italian National Statistical Institute, acts as co-ordinator of Sistan. Together with Istat other bodies belong to the National Statistical System, namely the statistical offices of: Ministries, national agencies, Regions and autonomous Provinces, Provinces, Municipalities, Chambers of Commerce, local governmental offices, private agencies and subjects with specific characteristics stated by the law.