The following symbols are used in the tables: the event exists, but some figures are unknown for whatever reason.

General instructions

Conventional symbols

The following symbols are used in the tables:

Line (-) a) the event does not exist;

b) the event exists and is measured, but no cases have been recorded.

Three points in square

brackets ([…]) the event exists, but all data related to the reference year are unknown for whatever reason, causing an interruption in the time series.

Four points (....) the event exists, but some figures are unknown for whatever reason.

Two points (..) a) values are less than half of the minimum unit used; b) the values calculated are not significant due to the small dimension of the event.

Provisional data and corrections

In some cases the figures related to more recent periods are provisional and therefore susceptible of correction in subsequent publications.

Figures contained in previous publications that do not correspond to those presented here are to be considered rectified in this release .

Rounding Due to rounding (values are often expressed in thousands or in millions) the same figures in different tables may slightly differ. For the same reason, totals in a table may not correspond to the sum of the respective components.

Percentage compositions are automatically rounded to the first decimal and, for this reason, the sum of the respective components may not be equal to 100%. In some cases the percentages, quotients, rates and other indicators presented are calculated on the basis of absolute and not rounded values, while many figures in this publication are rounded (to thousands, millions, etc.). Therefore, recalculating indicators starting from the data presented here may produce slightly different results.

Class intervals In tables showing the frequency distribution with class intervals, as a general rule the lowest values of each class are excluded and the highest values included in the range considered.

Age classes represent an exception, since age is expressed in completed years. For example: “0” refers to the age from birth to the day before the first birthday; the class “10-14 years” includes persons from their tenth birthday to the day before their 15th _{birthday; “75 years and over” refers to persons from their 75}th birthday and over.

Euro All values originally expressed in Lire were converted to Euros on the basis of a fixed exchange rate of 1,936.27 lire for 1 Euro (from1st _{January 1999, following} European Union Council Regulation n. 2866 dated 31st _{December 1998).}

Geographical areas

Five areas North-west

(North-western Italy)

Piemonte

Valle d’Aosta/Vallée d’Aoste Lombardia Liguria North-east (North-eastern Italy) Trentino-Alto Adige/Südtirol Bolzano/Bozen Trento Veneto Friuli-Venezia Giulia Emilia-Romagna Centre (Central Italy) Toscana Umbria Marche Lazio South (Southern Italy) Abruzzo Molise Campania Puglia Basilicata Calabria Islands (Italian islands) Sicilia Sardegna

Four areas North

(Northern Italy)

Piemonte

Valle d’Aosta/Vallée d’Aoste Lombardia Liguria Trentino-Alto Adige/Südtirol Bolzano/Bozen Trento Veneto Friuli-Venezia Giulia Emilia-Romagna Centre (Central Italy) Toscana Umbria Marche Lazio South (Southern Italy) Abruzzo Molise Campania

Islands

(Italian islands)

Sicilia Sardegna

Three areas North Piemonte

Valle d’Aosta/Vallée d’Aoste Lombardia Liguria Trentino-Alto Adige/Südtirol Bolzano/Bozen Trento Veneto Friuli-Venezia Giulia Emilia-Romagna Centre Toscana Umbria Marche Lazio South Abruzzo Molise Campania Puglia Basilicata Calabria Sicilia Sardegna

Glossary Specifies the meaning of terms used in each thematic area, with reference to the present day. Any variations over time are documented within the relevant chapters and the relative Warnings for time series comparisons.

Bibliographic references

Many time series presented here are reconstructed from the Compendia of time series published by Istat. The most important bibliography is listed below rather than within each thematic area. Most of these volumes can be found in digital format at the following link: http://lipari.istat.it/SebinaOpac/SebinaYOU.do .

− Compendia of time series

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- Population and housing census

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censimento generale (31 dicembre 1861). Torino.

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popolazione del Regno d’Italia al 31 dicembre 1871. Roma: Stamperia

reale.

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popolazione del Regno d’Italia al 31 dicembre 1881. Roma: Tipografia

Bodoniana.

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popolazione del Regno d’Italia al 10 febbraio 1901. Roma: Tipografia

nazionale Bertero.

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popolazione del Regno d’Italia al 10 giugno 1911. Roma: Tipografia

nazionale Bertero.

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Censimento della popolazione eseguito il 1° dicembre 1921. Roma:

Società anonima Scotti.

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generale della popolazione: 21 aprile 1931. Roma: Istituto poligrafico dello

Stato, Libreria.

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generale della popolazione: 21 aprile 1936. Roma: Failli.

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−

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1971. Roma: Istat.

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1981. Roma: Istat.

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20 ottobre 1991. Roma: Istat.

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abitazioni. Roma: Istat. http://dawinci.istat.it

- Census of Industry and Services

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opifici e delle imprese industriali al 10 giugno 1911. Roma: Tipografia

nazionale Bertero.

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industriale e commerciale: 15 ottobre 1927. Roma: Provveditorato

generale dello Stato.

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16 ottobre 1961. Roma: Failli.

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ottobre 1971. Roma: Failli.

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dei servizi e dell’artigianato: 26 ottobre 1981. Roma: Istat.

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1991. Roma: Istat.

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- Census of Agriculture

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1970. Roma: Istat.

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febbraio 1991. Roma: Istat.

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