Table 4. Sex ratios at birth in five years preceding the survey.

	1990		2007		2012
	n	SRB	n	SRB	n	SRB
Overall	6,426	101	9,112	110*	10,739	104
Region
Urban	3,373	100	3,116	115**	4,440	105
Rural	3,053	104	5,996	108	6,299	104
Birth order
1	1,126	115	1,880	108	2,423	107
2	1,021	106	1,673	110	2,116	107
3	944	99	1,397	125**	1,717	100
4	817	94	1,165	113	1,360	103
5+	2,518	97	2,997	105	3,123	103

Assuming independence p(boy)=0.5145.

^*p<0.1;

^**p<0.05 → 106 significantly different from estimated SRB.