SEWAGE																						
Sewage																						
		col1964	col1973	col1985	col1993	fra1962	fra1968	fra1975	fra1982	fra1990	ken1989	ken1999	mex1960	mex1970	mex1990	mex2000	usa1960	usa1970	usa1980	usa1990	vie1989	vie1999
																						
00	N/A										B		0				0	0	0	0		
10	Yes, access to sewage system or septic tank				1								1	1							3	1
11	   Sewage		1	1							1	1			1	1	1	1	1	1		
12	   Septic Tank		2	3							2	2			2	2	2	2	2	2		
20	No, no access to sewage system		1	1	1						1	1	1	1	1	1					1	1
99	Unknown		B	9							9			0	9	9					B	9