Population can be considered as the pivot point to which all development efforts of a country are directed. This assert to the fact that any development intervention that do not take the needs, conditions, aspirations and aims of the populace into considered can be considered as myopic. Since planning is concerned with the future, policy makers and planners require justified projections which provide information about the future size, structure and distribution of the population. Therefore effective development planning depends upon the natural knowledge of the composition, growth and movement of the population. It is therefore prudent on the part of policy makers and planners to encompass the current and future needs of the society in the development process.
Population data as such has assumed great importance in the day-to-day administration and functioning of society. The Kilimanjaro Programme of Action on population adopted by African countries in 1984 stressed that population should be a key factor in the formulation of development strategies and plans and that population and development are related.
The Need for Population Projection
Population projection forms an important component in development planning process. This is as such the need to carry out projection for the following reasons.
Population projection presents the net results of interaction between the components of population change, mortality, fertility and migration over time and their net effect on growth rate and age-sex composition of the population. This helps us to know what could happen if observed levels and trends in one of the components of population change were to persist.
In an attempt to plan for the provision for the basic needs of the population. It is imperative to obtain projected population by sectors or socio-economic groups. It includes those of labour force, agriculture, population, school enrolment and educational attainment and household and