The textbook did not include the units for the data given, Here they are:
LAND AREA: in 1000 square miles
POPULATION: in millions
POPULATION DENSITY: people per square mile
BIRTH RATE: number of births in a year per 1000 people in the
population
DEATH RATE: number of deaths in a year out of 1000 people in
the population
ANNUAL RATE OF NATURAL INCREASE IN THE POPULATION: % (this
number does not include immigration or emigration)
POPULATION DOUBLING TIME: number of years for the population
to double in size
INFANT MORTALITY: number of deaths of children age 1 year or
less out of 1000 live births
LIFE EXPECTANCE MALES: years
LIFE EXPECTANCY FEMALES: years
PERCENT URBAN: %
PER CAPITA GNP: US dollars