id	keyword
cpos-52	age
cpos-52	death
cpos-52	death rate
cpos-52	tempo
cpos-52	year
cpos-52	tempo effects
cpos-52	mortality
cpos-52	period
cpos-52	number
cpos-52	type
cpos-52	period death
cpos-52	cohort
cpos-52	method
cpos-52	year t
cpos-52	rates