id	keyword
cpos-31	statistics
cpos-31	births
cpos-31	perinatal
cpos-31	order
cpos-31	germany
cpos-31	age
cpos-31	specifi
cpos-31	fertility
cpos-31	hospital
cpos-31	child
cpos-31	data
cpos-31	rates
cpos-31	number
cpos-31	method