Rhode Island's population were reported as under 5, 23.6% under 18, and 14.5% were 65 or older. Females made up approximately 52% of the population. According to the 2010–2015 American Community Survey, the largest ancestry groups were Irish (18.3%), Italian (18.0%), English (10.5%), French (10.4%), and Portuguese (9.3%). Rhode Island has some of the highest percentages of Irish Americans and Italian Americans. Italian Americans make up a plurality in central and southern Providence County and French-Canadian Americans form a large part of northern Providence County. Irish Americans have a strong presence in Newport and Kent counties. Americans of English ancestry still have a presence in the state as well, especially in Washington County, and are often referred to as "Swamp Yankees". Rhode Island has a notable Lusophone community, having a higher percentage of Americans of Portuguese ancestry than any other state, including Portuguese Americans and Cape Verdean Americans. Additionally, the state also has the highest percentage of Liberian immigrants, with more than 15,000 residing in the state. African immigrants, including those from Cape Verde and Liberia, form significant and growing communities in Rhode Island. Rhode Island is one of the few states where Black people of recent foreign origin outnumber Black people of multigenerational American origin (African Americans). Rhode Island also has a sizable Asian community. Although Rhode Island has the smallest land area of all 50 states, it has the second highest population density of any state in the Union, second to that of New Jersey. Birth data Since 2016, data for births of White Hispanic origin are not collected, but included in one Hispanic group; persons of Hispanic origin may be of any race. Religion A Pew survey of Rhode Island residents' religious self-identification in 2014 showed the following distribution of affiliations: Catholic 42%, Protestant 30%, Jewish 1%, Jehovah's Witnesses 2%, Buddhism 1%, Mormonism 1%, Hinduism 1%, and Non-religious 20%. The largest denominations are the Catholic Church with 456,598 adherents, the Episcopal Church with 19,377, the American Baptist Churches USA with 15,220, and the United Methodist Church with 6,901 adherents. Rhode Island has had the highest proportion of Catholic residents of any state according to a study in 2000, mainly due to large Irish, Italian, and French-Canadian immigration in the past; recently, significant Portuguese and various Hispanic or Latino communities have also been established in the state. Though it has the highest overall Catholic percentage of any state,