Sectors
Nineteen branches of the tax register, each read across all 346 communes at once: where the work is filed, how concentrated it is, and what twenty years did to it. These are sections of a classification, not sector accounts — each page says exactly which section it is.
The 235 divisions underneath them → A branch of twenty-one parts says «agriculture»; these say wheat, table grapes and salmon farming.
The CIIU Rev. 4 has twenty-one sections. Two are left out because the register cannot describe them as a sector: households as employers, which reaches 33 dependent workers in the whole country, and extraterritorial bodies. The firms whose activity the SII has not recorded are not a section and have no page either.
Natural resources
2 branchesFarming, forestry and fishing
797,967dependent workers−5% since 2005Agriculture, livestock, forestry and fishing: section A of the tax register. It is the most evenly spread branch in the country — it takes 23 communes to reach half of its employment, more than any other — and one of the three that employ fewer people today than in 2005.
Mining
146,397dependent workers+136% since 2005Mining and quarrying: few communes, enormous sales. It is the sector where the distance between where the work happens and where it is declared weighs most on any commune-level figure.
Industry and construction
4 branchesManufacturing
758,761dependent workers+14% since 2005Manufacturing: the branch that transforms, concentrated where there is a port, pulp, salmon or food, and with a geography that moves little from one year to the next.
Construction
1,076,638dependent workers+22% since 2005Construction: the most cyclical sector in the register and the one that moves between communes fastest, because a large project appears in a territory's payroll and leaves it within a few years.
Electricity and gas
30,424dependent workers−23% since 2005Electricity, gas and air conditioning supply: a billion UF of annual sales made by thirty thousand people, some 34,000 UF each. It reaches fewer communes than any other branch — 166 of 346 — and has lost a larger share of its formal employment since 2005 than any other: almost a quarter of it.
Water and waste
84,436dependent workers+277% since 2005Water supply, sewerage and waste management: section E. It is the fastest-growing formal employment in the whole register — nearly four times its 2005 size — and it appears in 322 of the 346 communes, because water and rubbish are handled where people live.
Trade and logistics
3 branchesRetail and wholesale
1,299,941dependent workers+51% since 2005Wholesale and retail trade and vehicle repair: the branch with the most firms in the register — 472,763, more than the next three put together — and one of the two present in all 346 communes.
Transport and logistics
539,533dependent workers+91% since 2005Transport and storage: moving freight and people along a country 4,300 kilometres long. It is also the branch where a firm's registered address says least about where the work happens.
proxyTourism
481,456dependent workers+144% since 2005The tax register publishes no tourism sector. What is shown here is accommodation and food service — CIIU section I — which is the part of tourism that leaves a tax trace, and which also includes restaurants that never serve a single visitor.
Advanced services
5 branchesAdministrative and support services
1,438,688dependent workers+228% since 2005Administrative and support service activities: cleaning, security, staffing, call centres. It is the branch that declares the most formal employment in Chile — one in seven dependent workers in the register — and the one that added the most over the twenty years, a million people more than in 2005. It is also where outsourcing leaves its trace: the worker appears on the payroll of the firm that hired them, not of the place where they work.
Professional and technical services
379,545dependent workers+81% since 2005Professional, scientific and technical activities: law, accountancy, architecture, engineering, consulting, advertising, research. A hundred thousand firms for fewer than four hundred thousand workers — under four people per firm, and more than half of that employment in four communes.
Finance and insurance
253,701dependent workers+49% since 2005Financial and insurance activities: the highest-selling branch of the register, and the most concentrated of the nineteen. A single commune, Las Condes, declares more than half of its employment — which is where this register shows most clearly what it measures: not where work happens, but where it is filed from.
Information and communications
217,639dependent workers+83% since 2005Information and communications: software, telecommunications, publishing, radio and television. This is section J, and three Santiago communes hold half of its declared employment.
Real estate
66,865dependent workers+42% since 2005Real estate activities: sixty-two thousand firms and sixty-seven thousand workers — barely more than one person per firm, the lowest ratio in the register. It is the shape the register gives to an activity carried out mostly through companies that hold a property and employ no one.
State and social services
3 branchesPublic administration
675,320dependent workers+147% since 2005Public administration and defence: nine hundred and sixty-three taxpayers for six hundred and seventy-five thousand workers, around seven hundred people each. This is section O, the only one in the register whose units are municipalities, agencies and ministries rather than firms, and the only one that draws the map of the state instead of a market.
Education
668,256dependent workers+103% since 2005Education: schools, institutes and universities seen as employers. It doubled its formal employment in twenty years and appears in 300 communes, and it is the branch that follows most closely where the children are — the other side of the coin the education dimension measures on people.
Health and social work
465,701dependent workers+182% since 2005Human health and social work: one of the fastest-growing formal employments of the twenty years, and the one that follows where people live most closely.
Other services
2 branchesArts, entertainment and recreation
58,504dependent workers+78% since 2005Arts, entertainment and recreation: theatres, gyms, casinos, sports clubs, gambling. Section R is one of the smallest branches of the register and one of the most evenly spread: it takes twelve communes to reach half of its employment.
Other service activities
249,317dependent workers−5% since 2005Other service activities: hairdressers, laundries, repair of computers and personal goods, funeral services, trade unions and associations. Section S is the drawer CIIU leaves at the end, and it still employs a quarter of a million people across 318 communes.
The 19 branches add up to every dependent worker the SII files, and the families are PuroChile's own grouping of CIIU Rev. 4 — the same six that shade every employment treemap on the site. A branch counts a job at the address its employer pays tax from, which for mining, transport and outsourced services is not where the work happens.