suriname was a constituent country within the kingdom from 1954 to 1975, while the netherlands antilles was a constituent country from 1954 until 2010. suriname has since become an independent republic, and the netherlands antilles was divided into six. three are constituent countries: aruba (since 1986), curaçao and sint maarten (since 2010); three are special municipalities of the netherlands proper: bonaire, sint eustatius and saba. netherlands new guinea was a dependent territory of the kingdom until 1962, but was not an autonomous country, and was not mentioned in the charter.