Net migration rate: -1.59 migrant(s)/1,000 population (2000 est.)
Sex ratio: at birth: 1.03 male(s)/female under 15 years: 1.01 male(s)/female 15-64 years: 0.98 male(s)/female 65 years and over: 0.84 male(s)/female total population: 0.99 male(s)/female (2000 est.)
Infant mortality rate: 80.97 deaths/1,000 live births (2000 est.)
Life expectancy at birth: total population: 52.26 years male: 51.32 years female: 53.23 years (2000 est.)
Total fertility rate: 5.51 children born/woman (2000 est.)
Nationality: noun: Tanzanian(s) adjective: Tanzanian
Ethnic groups: mainland - native African 99% (of which 95% are Bantu consisting of more than 130 tribes), other 1% (consisting of Asian, European, and Arab); Zanzibar - Arab, native African, mixed Arab and native African
Religions: mainland - Christian 45%, Muslim 35%, indigenous beliefs 20%; Zanzibar - more than 99% Muslim
Languages: Kiswahili or Swahili (official), Kiunguju (name for Swahili in Zanzibar), English (official, primary language of commerce, administration, and higher education), Arabic (widely spoken in Zanzibar), many local languages note: Kiswahili (Swahili) is the mother tongue of the Bantu people living in Zanzibar and nearby coastal Tanzania; although Kiswahili is Bantu in structure and origin, its vocabulary draws on a variety of sources, including Arabic and English, and it has become the lingua franca of central and eastern Africa; the first language of most people is one of the local languages
Literacy: definition: age 15 and over can read and write Kiswahili (Swahili), English, or Arabic total population: 67.8% male: 79.4% female: 56.8% (1995 est.)