Statistics on the Wage of Persons with Disabilities  
Sampling errors: variation coefficients for the annual earnings per worker variable
Type of contract
Unidades: coefficient of variation

	Total	Persons without disabilities	Persons with disabilities	
Total	0,42	0,43	2,43	
Permanent contract	0,54	0,56	2,72	
Temporary contract	1	1,02	4,84	
Notas:
Persons with disabilities refers to persons formally recognised as disabled, with a degree of dissability of  33% or over, according to the procedure for evaluating this established in the RD 1971/1999 and modified by the RD 1856/2009.

 2) When the box is marked with a '-' sign before the data, it indicates that the number of sample  observations is between 100 and 500, so the figure is subject to great variability.
Fuente: Spanish National Statistics Institute