High Technology Indicators 
Summary of variables and indicators
Main economic variables/employment by period, type of indicator and high tech  sectors .
Units: defined in variables

;High tech manufacturing sectors: CNAE 21, 26, 30.3;Medium high technology manufacturing sectors: CNAE 20, 25.4, 27-29, 30 except 30.1 and 30.3, 32.5;High technology services sector: CNAE 59-63 and 72;High tech sectors:  Total;
Number of companies;2,715;18,442;68,359;89,516;
Business volume (thousand euros);31,397,571;165,807,140;90,757,393;287,962,104;
Added value (thousand euros);9,813,563;34,737,160;40,343,935;84,894,658;
Employees:  Total;167;628;606;1,401;
Employees:  % with respect to the total of those employed in AYMAT;11.9;44.8;43.3;100.0;
Employees:  % with respect to the total employed;0.8;3.2;3.1;7.1;
Notes:
1) Source (Main economic variables):  Industrial Companies Survey and Annual Services Survey. The scope of the Industrial Companies Survey refers to companies with 1 or more employees. The scope of the Annual Services Survey includes companies without employees 
 Source ( employment data):  Economically Active Population Survey  
   
 For reference year 2016, several methodological improvements have been applied to the Structural Enterprise Statistics, framed within the 'Project for the integration of structural economic surveys'. As a consequence of these changes, the results of said exercise are not strictly comparable to those of other years, as the evolution of the variables obeys not only to possible real changes produced in this period, but also to the effects of the methodological improvements on the estimation of said variables. This effect is more pronounced for the variable number of enterprises in the Trade and Services Sectors, and relatively small for the rest of the information. 
 For more details, please consult the specific document 'Measuring the effect of methodological changes in Structural Enterprises Statistics 2016': 
 https://www.ine.es/metodologia/t37/metodologia_eee_cambios2016.pdf 
    
 High technology sector, according to NACE 2009: 20, 21, 25.4, 26, 27-29, 30 except  30.1, 32.5, 59-63 y 72 
   
 The change of nomenclature in the literals is for clarity and not a methodological change.
Source: National Statistics Institute