id	keyword
cpos-470	low
cpos-470	birth
cpos-470	couples
cpos-470	education
cpos-470	fertility
cpos-470	countries
cpos-470	europe
cpos-470	pairings
cpos-470	high
cpos-470	nitsche
cpos-470	partners
cpos-470	time
cpos-470	research
cpos-470	rates
cpos-470	years
cpos-470	family
cpos-470	childbearing