Four-yearly Wage Structure Survey 
Four-yearly Wage Structure Survey. 2006
Variation coefficients for the gross annual earnings by studies
Unidades: %

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	
Notas:
Fuente: National Statistics Institute