Four-yearly Wage Structure Survey 
Sample errors
Studies completed. National total 
Unidades: %

All studies;0,37;
I. Without studies;3,9;
II. Primary education;1,43;
III. Secondary education I;0,9;
IV. Secondary education II;1,35;
V. Intermediate-level vocational training;1,39;
VI. Advanced vocational training;1,32;
VII. University diploma-holders or the equivalent;1,39;
VIII. University graduates, advanced engineers and doctors;1,37;
Notas:
Fuente: National Statistics Institute