Kenya vs. Tanzania

Kenya has experienced dramatic population growth since the mid-20th century as a result of its high birth rate and its declining mortality rate. More than 40% of Kenyans are under the age of 15 because of sustained high fertility, early marriage and childbearing, and an unmet need for family planning. Kenya's persistent rapid population growth strains the labor market, social services, arable land, and natural resources. Although Kenya in 1967 was the first Sub-Saharan country to launch a nationwide family planning program, progress in reducing the birth rate has largely stalled since the late 1990s, when the government decreased its support for family planning to focus on the HIV epidemic. Government commitment and international technical support spurred Kenyan contraceptive use, decreasing the fertility rate (children per woman) from about 8 in the late 1970s to less than 5 children twenty years later, but it has plateaued at just over 3 children today.

Kenya is a source of emigrants and a host country for refugees. In the 1960s and 1970s, Kenyans pursued higher education in the UK because of colonial ties, but as British immigration rules tightened, the US, the then Soviet Union, and Canada became attractive study destinations. Kenya's stagnant economy and political problems during the 1980s and 1990s led to an outpouring of Kenyan students and professionals seeking permanent opportunities in the West and southern Africa. Nevertheless, Kenya's relative stability since its independence in 1963 has attracted hundreds of thousands of refugees escaping violent conflicts in neighboring countries; Kenya shelters more than 300,000 Somali refugees as of April 2017.

Tanzania has the largest population in East Africa and the lowest population density; almost a third of the population is urban. Tanzania's youthful population - about two-thirds of the population is under 25 - is growing rapidly because of the high total fertility rate of 4.8 children per woman. Progress in reducing the birth rate has stalled, sustaining the country's nearly 3% annual growth. The maternal mortality rate has improved since 2000, yet it remains very high because of early and frequent pregnancies, inadequate maternal health services, and a lack of skilled birth attendants - problems that are worse among poor and rural women. Tanzania has made strides in reducing under-5 and infant mortality rates, but a recent drop in immunization threatens to undermine gains in child health. Malaria is a leading killer of children under 5, while HIV is the main source of adult mortality

For Tanzania, most migration is internal, rural to urban movement, while some temporary labor migration from towns to plantations takes place seasonally for harvests. Tanzania was Africa's largest refugee-hosting country for decades, hosting hundreds of thousands of refugees from the Great Lakes region, primarily Burundi, over the last fifty years. However, the assisted repatriation and naturalization of tens of thousands of Burundian refugees between 2002 and 2014 dramatically reduced the refugee population. Tanzania is increasingly a transit country for illegal migrants from the Horn of Africa and the Great Lakes region who are heading to southern Africa for security reasons and/or economic opportunities. Some of these migrants choose to settle in Tanzania.