Note: To obtain results by autonomous communities, the Local Unit whose main activity is Trade is considered a statistical unit. These local units may be part of companies whose activities are included in other sectors and, in such cases, their data at the company level is not included in the Trade sector. Another difference between regional data (by local units) and national data (by companies) is that only in the latter is it necessary to apply internal flow consolidations to each company. This explains why the total turnover is slightly higher in regional data than in national data.