Mr. Cathal O'Regan:

It is a database provided by An Post called GeoDirectory. It is the most comprehensive database of all households in the country. Essentially, every household in the country is in the mix to be selected as one of the 20,000. Out of the 2.3 million we get a random selection of 20,000 that reflects the population distribution around the country. From that 20,000 the applicants are whittled down to 99.