Four-yearly Wage Structure Survey 
Sampling errors
Studies completed. National total
Units: %

All studies;0.37;
I. Without studies;3.90;
II. Primary education;1.43;
III. Secondary education I;0.90;
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;
Notes:
Source: National Statistics Institute