Ireland’s population increased to 4,761,865 in 2016, up 3.8 percent from 2011, according to data collected last year on the 100th anniversary of the start of the 1916 Easter Rising. The state had experienced 8 percent growth in the 2011, 2006 and 2002 census counts.

The proportion of the population who were non-Irish nationals fell to 11.6 percent in 2016 from 12.2 percent in 2011, the first decline since the census question was introduced in 2002. This is partially explained by a near doubling of people holding dual nationality, a separate category.

The 6 April data release is the first of 13 reports on Census 2016 that are due to be published this year. The Central Statistics Office will publish 11 thematic profiles, which will each explore topics such as housing, the homeless, religion, disability and carers in greater detail.

Highlights of the initial report include:

• Self-identified Roman Catholics fell 3.4 percent, from 84.2 percent of the population in 2011 to 78.3 percent in 2016. Nearly 10 percent of census respondents said they have no religion.
• The country is slightly older, with average age of 37.4 in April 2016 compared with 36.1 five years earlier. County Fingal, north of Dublin, had the youngest average age at 34.3, while Kerry and Mayo in the west were each at 40.2
• The largest number of Irish speakers who use the language daily outside the education system remain concentrated in the Gaeltacht areas of counties Donegal, Galway and Kerry.
• Private residences with no internet connection fell to 18.4 percent of dwellings, down from 25.8 percent in 2011.