series_id	year	period	value	footnote_codes
HSU00000002      	1978	A01	         2.2	
HSU00000002      	1979	A01	         2.2	
HSU00000002      	1980	A01	         2.2	
HSU00000008      	1978	A01	         2.2	
HSU00000008      	1979	A01	         2.2	
HSU00000008      	1980	A01	         2.2	
HSU00000011      	1976	A01	         2.2	
HSU00000011      	1977	A01	         2.2	
HSU00000011      	1978	A01	         2.2	
HSU00000011      	1979	A01	         2.2	
HSU00000011      	1980	A01	         2.2	
HSU00000013      	1976	A01	         2.2	
HSU00000013      	1977	A01	         2.2	
HSU00000013      	1978	A01	         2.2	
HSU00000013      	1979	A01	         2.2	
HSU00000013      	1980	A01	         2.2