id	keyword
cpos-251	population estimates
cpos-251	migration
cpos-251	germany
cpos-251	data
cpos-251	migration data
cpos-251	approach
cpos-251	period
cpos-251	offi
cpos-251	migration events
cpos-251	east
cpos-251	census
cpos-251	year
cpos-251	west
cpos-251	adjustment
cpos-251	age
cpos-251	west germany
cpos-251	cohort
cpos-251	numbers
cpos-251	population numbers
cpos-251	cial
cpos-251	east germany