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

,Total,
Total,2,6,
33% to 44%,3,12,
45% to 64%,5,5,
65% to 74%,7,91,
75% and over,8,36,
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