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

All studies;0.45;
I. Without studies;1.42;
II. Primary education;1.43;
III. Secondary education I;0.72;
IV. Secondary education II;1.34;
V. Intermediate vocational training;1.03;
VI. Advanced level vocational training;0.91;
VII. University diploma or equivalent;1.67;
VIII. University graduates, advanced engineers and doctors;1.13;
Notes:
Source: National Statistics Institute