Crude birth rate (CBR)
The number of births per 1,000 people per year
Crude death rate (CDR)
The number of deaths per 1,000 people per year
Natural increase rate (NIR)
The rate at which a population grows
Doubling time (DT)
The time it takes for a population to double in size
Total fertility rate (TFR)
The average number of children a woman is expected to have during her lifetime, based on current birth rates
Ecological footprint (EF)
The area of land and water needed to sustain a population’s resource use and waste production