(2020 est.) total: 17.9 years. Country comparison to the world: 215th male: 17.6 years female: 18.2 years (2018 est.) total: 17.3 years male: 17.0 years female: 17.6 years (2013 est.) Birth rate 33.3 births/1,000 population (2022 est.) Country comparison to the world: 21st 35.3 births/1,000 population (2018 est.) Country comparison to the world: 19th Death rate 5.09 deaths/1,000 population (2022 est.) Country comparison to the world: 192nd 7.5 deaths/1,000 population (2018 est.) Country comparison to the world: 112nd Total fertility rate 4.39 children born/woman (2022 est.) Country comparison to the world: 20th 4.71 children born/woman (2018 est.) Country comparison to the world: 20th Population growth rate 2.78% (2022 est.) Country comparison to the world: 13rd 2.74% (2018 est.) Country comparison to the world: 14th Mother's mean age at first birth 19.8 years (2015/16 est.) note: median age at first birth among women 25-29 Contraceptive prevalence rate 38.4% (2015/16) Net migration rate -0.41 migrant(s)/1,000 population (2022 est.) Country comparison to the world: 123rd -0.5 migrant(s)/1,000 population (2018 est.) Country comparison to the world: 127th Dependency ratios total dependency ratio: 93.4 (2015 est.) youth dependency ratio: 87.4 (2015 est.) elderly dependency ratio: 6 (2015 est.) potential support ratio: 16.6 (2015 est.) Urbanization urban population: 36.7% of total population (2022) rate of urbanization: 4.89% annual rate of change (2020-25 est.) urban population: 33.8% of total population (2018) rate of urbanization: 5.22% annual rate of change (2015-20 est.) Major infectious diseases degree of risk: very high (2020) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever vectorborne diseases: malaria, dengue fever, and Rift Valley fever water contact diseases: schistosomiasis animal contact diseases: rabies Ethnic groups mainland - African 99% (of which 95% are Bantu consisting of more than 130 tribes), other 1% (consisting of Asian, European, and Arab); Zanzibar - Arab, African, mixed Arab and African. Around 100,000 people living in Tanzania are from Europe or Asia. Sex ratio at birth: 1.03 male(s)/female 0-14 years: 1.02 male(s)/female 15–54 years: 1.00 male(s)/female 55-64 years: 0.75 male(s)/female 65 years and over: 0.76 male(s)/female total population: 0.99 male(s)/female (2013 estimate) Life expectancy at birth total population: 70.19 years. Country comparison to the world: 169th male: 68.42 years female: 72.02 years (2022 est.) total population: 63.1 years male: 61.6 years female: 64.6 years (2018 est.) total population: 60.76 years male: 59.48 years female: 62.09 years (2013 estimate) HIV/AIDS Age 15-49 HIV infection rates: 4.5 percent overall,