Population: Total population and distribution by age and sex estimated to be consistent with the population by age and sex of the (a) 1950, 1960, 1970, 1980, 1991, 2000, 2010 censuses; (b) adjusted for under/over count; (c) adjusted for age heaping; (d) adjusted for under enumeration of children under age 15; (e) official estimates through 2021; and with estimates of the subsequent trends in fertility, mortality and international migration.  In addition, the (a) 1996, 2007 Count; (b) adjusted for under enumeration of children under age 15 have been considered.

Fertility: Total fertility rate and age pattern of fertility based on: (a) registered births classified by age of mother and the underlying female population by age through 2021; (b) adjusted for underregistration; (c) birth-histories data from the 1986 FP-MCH DHS and 1996 DHS; (d) adjusted fertility using Brass P/F ratio method (or variants) with data on children ever born and births in the preceding 12 (or 24/36) months, both classified by age of mother, from the 1980, 1991, 2000 censuses; (e) indirect estimates obtained from the application of the reverse survival method to the 1970, 1980, 1991, 2000, 2010 censuses and 1996 Count.  In addition, the (a) official estimates of age-specific fertility rates through 2016; (b) births in the household in the preceding 12 (or 24) months classified by age of mother from the 1980, 1991, 2000, 2010 censuses; (c) adjusted fertility using Brass P/F ratio method (or variants) with data on children ever born and births in the preceding 12 (or 24/36) months, both classified by age of mother, from the 1950-2016 Estimates and 2010 Census; (d) adjusted fertility using Arriaga modified P/F ratio method with data on children ever born and births in the preceding 12 (or 24/36) months, both classified by age of mother, from the 1950-2016 Estimates; (e) indirect estimates based on the increment of cohort parities between successive censuses or surveys such as the 1950-2016 Estimates; (f) indirect estimates obtained from the application of the reverse survival method to the 1950, 1960 censuses and 1955-2010 Education Stats and 2007 Count; (g) cohort-completed fertility backdated by the mean age of childbearing from the 1950, 1960, 1970, 1980, 1991, 2000, 2010 censuses and 1950-2016 Estimates and 1996 DHS have been considered.

Child Mortality: Under-five mortality based on: (a) official estimates of infant and child mortality through 2017; (b) registered infant and child deaths through 2021; (c) direct estimates from births and deaths under-five calculated from full birth histories data from the 1986 FP-MCH DHS and 1986 Annual PNAD and 1996 DHS; (d) indirect estimates from data on children ever born and surviving from the 1970, 1980, 1991, 2000 censuses and 1972, 1973, 1976, 1977, 1978, 1984, 1986, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2011, 2012, 2013, 2014, 2015 Annual PNAD; (e) International estimates used up to 2021.  In addition, the (a) indirect estimates from data on children ever born and surviving from the 2010 Census; (b) recent household deaths from the 2010 Census have been considered.

Overall Mortality: Life expectancy at birth and age pattern of mortality based on: (a) official estimates through 2017; (b) registered deaths by age and sex available through 2021; (c) adjusted for underreporting of infant and child deaths; (d) adult deaths adjusted for underregistration using death distribution methods; (e) mortality rates for older ages were adjusted.

Migration: International migration based on: (a) official figures of net international migration flows, and assumed subsequent trends in international migration; (b) information on foreign-born populations from censuses and registers from major countries of destination; (c) estimates derived as the differences between overall population growth and natural increase; (d) UNHCR statistics on the number of refugees in the main countries of asylum.