Sampling errors Results by occupation (main groups) of the main breadwinner and variation coefficient. Units: % variation coefficient All occupations 1.54 Management of companies and Public Administration 4.93 Scientific and intellectual technicians and professionals 6.13 Support technicians and professionals 5.19 Administrative type employees 6.43 Catering, personal and protection services employees and salespersons 5.87 Workers skilled in agriculture and fishing 8.79 Craftspersons and employees qualified for the manufacturing, construction, and mining industries 3.27 Operators and fitters of fixed machinery and drivers and operators of mobile machinery 5.18 Unskilled workers 5.52 Notes: 1) Households with employed main breadwinner Source: National Statistics Institute