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