It is presumed that the Question is referring to children in emergency accommodation. The Pathway Accommodation and Support System (PASS) was implemented nationally in 2014 as a national information and management system for homeless services that are overseen by housing authorities. My Department collates PASS data from lead housing authorities on a monthly basis and these monthly homeless reports are published on my Department's website and can be accessed using the following link: http://www.housing.gov.ie/housing/homelessness/other/homelessness-data.
Prior to the introduction of PASS, data on the number of homeless households, and the composition of those households, was not quantified nationally on an on-going basis. Consequently, the details requested in relation to 2011 to 2013 are not available in my Department.