Namibia (full name, The Republic of Namibia) covers an area of approximately 824,000 sq km. Its terrain consists of mostly high plateau with the Namib Desert along the coast and the Kalahari Desert in the east. Namibia borders Angola, Botswana, South Africa and Zambia, and has 1,572 km of coastline. The country is divided into 13 administrative regions: Caprivi, Erongo, Hardap, Karas, Khomas, Kunene, Ohangwena, Okavango, Omaheke, Omusati, Oshana, Oshikoto and Otjozondjupa. Windhoek is the capital, with a time difference of 1 hour ahead of GMT. The currency is the Namibian dollar, and exports include diamonds, copper, gold, zinc, lead, uranium and livestock. The population of approximately 2,100,000 people comprises an ethnic makeup that is 87.5% black Africans. Primary languages are English followed by Afrikaans, German, Oshivambo, Herero and Nama, and the predominant religion is Christianity.