---

Table 1. Vivienda variables in existence in various censuses

Year	Type [5]	Occ [6]	roof [*]	wall	floor [2]	water [9]	sewage [10]	bath [11]	elec [13]	# hhlds	phone	garbage	nat. gas
1964	x	x	x	x	x	x	x	x	x@	x	-	-	-
1973	x	x	x	x	x	x	x	-	x	x	-	-	-
1985	x	x	-	x	x	x	x	-	x	-	-	-	-
1993	x	x	-	x	x	x	x	-	x	x	x	x	-
2001	x	x	-	x	x	x	x	-	x	x	x	x	x
@ The 1964 census reported on electricity for lighting "Si tiene instalación de alumbrado eléctrico...."