id	keyword
cpos-172	fertility
cpos-172	development
cpos-172	counties
cpos-172	human
cpos-172	urban
cpos-172	rural
cpos-172	states
cpos-172	population
cpos-172	tfr
cpos-172	united
cpos-172	relationship
cpos-172	u.s
cpos-172	indicators
cpos-172	period
cpos-172	life
cpos-172	expectancy
cpos-172	health
cpos-172	education