Encuesta de Fecundidad Total Average age of females size of municipality of residence at time of marriage/No. live births. Unidades: Average age ;Average age of females (years) at 1st marriage;Average age of females (years) at birth of 1st live birth;Average age of females (years) at birth of 2nd live birth;Average age of females (years) at birth of the last live birth; Total;22,6;24,22;27,36;28,3; Up to 10,000 inhabitants;22,5;23,97;26,94;28,07; From 10,001 to 50,000 inhabitants;22,21;24,04;27,41;28,25; From 50,001 to 500,000 inhabitants;22,71;24,14;27,24;28,18; More than 500,000 inhabitants;23,2;25,09;28,2;29,04; Notas: Fuente: