Four-yearly Wage Structure Survey Four-yearly Wage Structure Survey. 2006 Variation coefficients for the gross annual earnings by Autonomous Community and type of contract. Unidades: % ,Total,Indefinite duration,Determined duration, National total,0,5,0,5,0,9, Andalucía,1,2,1,7,2,2, Aragón,1,1,3,2,6, Principado de Asturias,1,1,1,5,2,2, Balears (Illes),2,4,2,6,3, Canarias,1,3,1,8,3, Cantabria,1,1,1,4,2,6, Castilla-La Mancha,0,9,1,3,2,4, Castilla y León,1,1,1,6,2,2, Cataluña,0,9,1,2,9, Comunidad Valenciana,2,1,1,5,5,2, Extremadura,1,5,2,1,2,7, Galicia,1,1,3,2,1, Comunidad de Madrid,1,4,1,8,2, Región de Murcia,1,1,5,2,1, Comunidad Foral de Navarra,0,9,1,2,2,7, País Vasco,1,1,3,2, Rioja (La),1,1,4,3,1, Cities of Ceuta and Melilla,3,2,4,2,9, Notas: Fuente: National Statistics Institute