Percentage of children (aged 12–23 months) who had received full immunization by place of residence in six geographical regions of India, 1992–2006, NFHS.

Note: aUrban-rural inequality ratio calculated as (urban/rural*100). Differences in full immunization by place of residence were significant at p<0.01 based on Chi-squared test in all three rounds of survey. Differences in full immunization by region of residence were significant at p<0.01 in all the three rounds of survey based on Chi-squared test.