The population density was 1.8 inhab./km2 in 2006. This mark is lower than the Brazilian density, 19.94 inhab./km2. The distribution of the state population is uneven, with a greater concentration in the capital region and the south of the state. Five municipalities – Boa Vista, Rorainópolis, Alto Alegre, Caracaraí and Bonfim – concentrate more than half of the population of Roraima. In 2017, the Human Development Index (HDI) of Roraima was 0.752, considered high and placing the state in 12th position among the 26 states in Brazil. Ethnicity Cultural, political and economic traits inherited from the Portuguese, Spanish and Dutch are influential in Roraima. Also, the importance of the indigenous peoples in terms of ethnic contribution cannot be forgotten. It was the indigenous people who initiated human occupation in the Amazon region, and their descendants, the caboclos, developed in close contact with the environment, adapting to the regional peculiarities and opportunities offered by the forest. In its historical formation, the Roraiman demography is the result of the miscegenation of the three basic ethnic groups that make up the population in the state: the Indigenous, the Europeans and the Africans, thus forming the mestizos of the region (caboclos). Later, with the arrival of migrants, especially from the Northeast of Brazil, a "broth" of singular culture was formed, which characterizes a large part of the population, its values and way of life. According to the 2010 census, the total population of Roraima was composed of Pardos (mixed-race, 60.92%), Whites (20.90%), Indigenous (11.18%), Afro-Brazilians (6.04%) and Asians (0.96%). Roraima also recognizes mestizo identity. Mestizo Day (June 27) is an official date in the state. Religion According to data from 2010, from the Brazilian Institute of Geography and Statistics (IBGE), the main religious denominations of Roraima were: Catholicism (50.5%), Protestantism (30.3%), no religion (12.98%), Indigenous religions (2.75%), Spiritism (0.91%), Buddhism (0.13%), Candomblé (0.08%), Esoteric traditions (0.03%), Judaism and Islam (0.03% each), Umbanda (0.02%) and Hinduism (0.01%). The Roman Catholic Diocese of Roraima, a suffragan diocese of the Archdiocese of Manaus, is the only Catholic diocese in the state of Roraima. It belongs to the Ecclesiastical Province of Manaus and the Northern Regional Episcopal Council of the National Conference of Bishops of Brazil. The episcopal see is in the Cristo Redentor Cathedral, in the city of Boa Vista. In addition to the majority Catholic Church, there are dozens of different Protestant denominations in the state.