French Guiana capita that year, and 56.5% of the metropolitan French regions outside the Paris Region. French Guiana's population of 281,612 (2018 estimate), most of whom live along the coast, is very ethnically diverse. At the 2014 census, 57.3% of the inhabitants of French Guiana were born in the region, 9.3% were born in Metropolitan France, 3.0% were born in the French Caribbean departments and collectivities (Guadeloupe, Martinique, Saint Martin, Saint Barthélemy), and 30.2% were born in foreign countries (primarily Suriname, Brazil and Haiti). Estimates of the percentages of French Guiana ethnic composition vary, a situation compounded by the large proportion of
Suriname the Atlantic coast. The southernmost borders with French Guiana and Guyana are disputed by these countries along the Marowijne and Corantijn rivers, respectively, while a part of the disputed maritime boundary with Guyana was arbitrated by a tribunal convened under the rules set out in of the United Nations Convention on the Law of the Sea on 20 September 2007. Lying 2 to 5 degrees north of the equator, Suriname has a very hot and wet tropical climate, and temperatures do not vary much throughout the year. Average relative humidity is between 80% and 90%. Its average temperature ranges from