The population of Fiji is mostly made up of native Fijians, who are Melanesians (54.3%), although many also have Polynesian ancestry; and Indo-Fijians (38.1%), descendants of Indian contract labourers brought to the islands by the British colonial powers in the 19th century. The percentage of the population of Indo-Fijian descent has declined significantly over the last two decades through migration for various reasons. Indo-Fijians suffered reprisals for a period after the coup of 2000. Relationships between ethnic Fijians and Indo-Fijians in the political arena have often been strained, and the tension between the two communities has dominated politics in the islands for the past generation. The level of political tension varies among different regions of the country.