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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.

  • Four dots ( .... )

    the event exists, but all data related to the reference year are unknown for whatever reason, causing an interruption in the time series.

  • Two dots ( .. )

    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.

  • Asterisk (*)

    The value is omitted to safeguard statistical confidentiality.

  • Three plus symbols (+++)

    for variation higher than 999.9 percent.

Percentage compositions

  • 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 percent.

Geographical areas

Centre and North:

  • North-west: Piemonte, Valle d’Aosta/Vallée d’Aoste, Lombardia, Liguria
  • North-east: Trentino-Alto Adige/Südtirol, Veneto, Friuli-Venezia Giulia, Emilia-Romagna
  • Centre: Toscana, Umbria, Marche, Lazio

Mezzogiorno

  • South: Abruzzo, Molise, Campania, Puglia, Basilicata, Calabria
  • Islands: Sicilia, Sardegna.