Four-yearly Wage Structure Survey 
Sample errors
Variation coefficients for the gross annual earnings by studies
Units: %

All studies;0.40;
I. Without studies;3.10;
II. Primary education;1.00;
III. Secondary education I;1.00;
IV. Secondary education II;1.40;
V. Intermediate vocational training;1.20;
VI. Advanced level vocational training;1.00;
VII. University diploma or equivalent;1.10;
VIII. University graduates, advanced engineers and doctors;1.10;
Notes:
Source: National Statistics Institute